Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea700a34bd6e80c2…

MALICIOUS

PDF

89.8 KB Created: 2021-07-31 00:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 64ad215e3438caaf5c84f54087233183 SHA-1: 636c3d7ed51019a18b1ecb4f0e59e2af91f6064f SHA-256: ea700a34bd6e80c204f18519faaf8bb84c7808a898ca5f4dcf3afbc037f66534
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to lure users into clicking malicious links. No scripts were extracted, and the document body was unreadable, but the heuristic findings strongly suggest a malicious link aggregation pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • 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.
  • 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://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5rf71iv68iek1lp8lcghm33qb8/39406623007.pdf In PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609109a6d3a7b---73879893901.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608786a3485a4---25439273600.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/cba7a851497a5b6e1cae34ff36cc2922/76376139000.pdfIn PDF document text
    • http://mamitobe.ru/files/file/sudativakilolozu.pdfIn PDF document text
    • https://tecnicamistasnc.it/file/82017706416.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cec23be3f---73831571848.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/jidovupedetelemodu.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ed758b7ffd6bb20ae5cfa3164b04f59/lerado.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6ad77d3c9---wuxanipufufatodowov.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/tqo3hlkiii9219s64lvntoi7f1/59944473661.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ced1a02162---dofutega.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/muvojorofeberezopaven.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/4c2a0cc1db94f70775c9e6d1143ad754/20686564553.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ht8dittl7q8e30jj0a4tfovbsp/seweju.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/tqe02tegblaep1h2h0lqh8k9oa/darojebelumupejitivona.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fff9f6b93d1---nawaku.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/6534bcfcf36b8d52f649f74309a8d7c6/vokog.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f3fa6b7f6---jirubibibizifezerurape.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086baddbc69d---vuvavopunolowe.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/jejulosajofarofazu.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/dugojibipufuxigokexopino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=exercice+mots+de+la+meme+famille+cm2PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 10736 bytes
SHA-256: ba43002a676b59761733b24a5648aca0206993b2c90ba2f006359cf530f47104
font_01_sfnt_off00010963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 22436 bytes
SHA-256: 63b682d464f7788e549066d358f001c0ab67f061fe603f00af0c8e37a1b783d1

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