Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e78a2b39965a93…

MALICIOUS

PDF

89.8 KB Created: 2021-08-20 00:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 12289d6b882f31b9d0dd2c0da1e08822 SHA-1: ceca61d0d679d183c0923e3d1341c2fa8f5520de SHA-256: 14e78a2b39965a930bc9ea031e0690ea854a1715f3f9cbb385f5e37d2b7a535a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to execute malicious actions within a PDF. It also features a high number of links pointing to potentially compromised WordPress sites and disposable hosting, suggesting a link farm designed to obscure the ultimate destination. These elements indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://rowanfamilyreunion.com/clients/28915/File/53592280222.pdf In PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/trj0a4ount75sjk4spsmbeogik/rumagotofibelimaverabig.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210629011435.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/64554401371.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4978c1a54c---6587355976.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/7d873447bc5da6342706b142e5c972b9/gibekabakeni.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/25582009218.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/742b43b21a59db627e6cf651a2f55dc9/24287000864.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/riteligugakapomas.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/jipijulepafamimeweberew.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/e1fmn0stbun7gqeufkqgoab1hi/geperikenavomolomupur.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/givj6cagf1c9iae54ut6d2n0i4/29854313048.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed7a86d32b---59960778488.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/tisuzinojivutalodal.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/sowolaweketuvozojikefel.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/1480647918.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/80476653719.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/pumonazafu.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/da9b8c976f7d39417361ee6e208a9a31/kemisobupo.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/59499592382.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/33312610482.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/80134799618.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/15333516613.pdfIn PDF document text
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/13396935890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cheats+for+legend+of+zelda+breath+of+the+wildPDF link annotation
    • 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_off0000e496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE496 16596 bytes
SHA-256: 7eb1125b482ea82dfc0108b1133d198d7315dfa56e68231df481e8776e4bc959
font_01_sfnt_off00010f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 6912 bytes
SHA-256: a810b6df989373673e0941f1b6f084d793165d0ee44ccff930c3a031c0f82084
font_02_sfnt_off00012764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7B 10948 bytes
SHA-256: b5efef3318edd37d0ca8cdaa10888414f35d9a4913f7234ed0d91abf753d473f

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