Malicious PDF — malware analysis report

Static analysis result for SHA-256 4988847266f5539b…

MALICIOUS

PDF

125.6 KB Created: 2021-08-05 03:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9cc0a4cdb6d82e1036196a02b856c286 SHA-1: 8af4eed25b2dff61ebff070388059af188412b66 SHA-256: 4988847266f5539ba10327680c77cd998d6035b8da4f67d818ef7c7699293919
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The document also includes a 'clipboard command lure' heuristic, indicating it likely instructs the user to copy and paste commands into a shell, a common technique for downloading and executing further malicious content. No scripts were extracted, but the combination of link farms and the command lure strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9831

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=finding+nemo+full+movie+free+download+mp4 PDF link annotation
    • http://rideabikenews.com/user_img/files/wivadu.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/34262209834.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/39158094349.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/34188949520.pdfIn PDF document text
    • http://hylevel.net/Uploadfiles/files/28266041133.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/11d09295754d1a6c93f7ba7466661f1e/19426032501.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/fupavoleralemuj.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746ae7b6a30---56253041342.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/f2f6d73519cfc4dc450bb46d18d53554/14315059913.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c86319c19ef---16934233584.pdfIn PDF document text
    • http://halmar.info/userfiles/file/90641872388.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083476d8bfe8---1157334829.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/edk5f20ct68hff00qcndsn5b41/makuvurakijanip.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/ab9755e2e0bf192de0e2ef134be740ab/fujumedo.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/jsn1nud00rc3slnvlka08ik4m7/polirujovumelokosubuziv.pdfIn PDF document text
    • https://diphong.com/uploads/ribemose.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/uc5ctf6lilsqsjivti4k6m53e2/naxagupigepado.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/kazudaf.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d6d875e7f---76711856907.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609143e781536---develurinu.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a963fc8be42---supetelexeradudud.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a80b05e379---57685383879.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4d6e414e6---gewosopinuzodi.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606eed1ab7eb8---zogobikojifo.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/wetuwuwar.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d26ae42d9a---bawitewuxod.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17009 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001881b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1881B 18352 bytes
SHA-256: be6c49f6651c79e68fb74998065a0b366b8ea85b5faac1d6c4ef13db39a4e14a
font_02_sfnt_off0001b859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B859 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off0001ce65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE65 10880 bytes
SHA-256: 676c15cadd42faf293c8f73825094e5d0f6c52ac086ea7ee4b7600163d5fc2f7

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