Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04ece2c9f5d481d…

MALICIOUS

PDF

85.7 KB Created: 2021-08-27 05:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6e1ccf8079b31ebd38c5125436298a16 SHA-1: 8508cecfc21c56089fa822b4325563e2997bd88f SHA-256: d04ece2c9f5d481dac174102d63659cd136475a3a0721305d886b4d69bd3f40e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is a lure to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=foerster+precalculus+with+trigonometry+answers PDF link annotation
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077dd8fbe02e---24508912364.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4b2be2a6611e22853dffd042b072c759/97001828682.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbb6539446---95724282820.pdfIn PDF document text
    • http://www.moyekolodin.com/files/31922287383.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/90111595025.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/77677ec2e3bc71012a2a6de4429d17e4/wamovap.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/fb1c0fe04f3881d531d1cd632676dfef/bogitivasiguwojavupa.pdfIn PDF document text
    • http://gapp.fr/medias/files/lenipujewazumil.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd814f34c1---18924471940.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/26449910802.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/rativez.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/46553539577.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210731_C296F9C21FED58A2.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/0h1qondi3c0n89s6ei4bnmfn61/tamowuduputiteromok.pdfIn PDF document text
    • http://industrialdevices.in/uploads/98883615419.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b9be2b5e608f1c010cb6bd61baece0b9/75050404146.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/kupelu.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/75359883645.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/dojez.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/66232839032.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4a90b952c262e70749c931963f6e4928/nijetojowabomilukirabet.pdfIn PDF document text
    • https://dineflon.com//files/81767716978.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/84019668556.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b7817c596ae6cefd50520a81fb4f4803/jobifizedoro.pdfIn PDF document text
    • http://airsoft1.ro/files/file/redugugoxife.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/rnkm4grurvs56mtrgdoofiigbd/66539561408.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 11100 bytes
SHA-256: e3bd0eac3ca1384f678670eb043c23a50b8814f9d8a9b87fd16a95c771ab5b62
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 17400 bytes
SHA-256: b37891792be6b7bc482fa7729364f344f03dec8debc59270ef2436deb0f0a87a
font_02_sfnt_off00012fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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