Malicious PDF — malware analysis report

Static analysis result for SHA-256 3605eafdb72001d1…

MALICIOUS

PDF

88.7 KB Created: 2021-07-05 23:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dfc1409b5ce3d2a32d3dff6d27869385 SHA-1: 89ab6f05c624ada2e8a5c84c8b9501af4523cfc4 SHA-256: 3605eafdb72001d1fb66cbaed5ff04ea39e6f3dfe3cf2222eb8ae0c35d02834e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aebdf3a0ede---belamikuwukepelotek.pdf In PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/6ta3rkj0uq3jjegmudfvdbjksp/91040722209.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/22b23d3f643c5af6e37db2af168c4fb0/zajagef.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/fobabiwebajiwopovunax.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/777f75e619c8ee80f96dd77fa9a2bf66/sujawozofinudivamafip.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/k2qbodpm3q5pte15ibq03cd52v/97898350930.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a88d72ea1fe---rizitejiminodelodidezebe.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/dmjb50qa5ql43s0eeenc8mcmb5/24124807049.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/9ce0c9fb76551815b43ddc69d278ff8b/votuxe.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/96940277918.pdfIn PDF document text
    • http://pronobile.de/catalog/file/10578766938.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d8aface587c---41479675461.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/73597394041.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/durotube.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/ee2918bd519c9bedcf766fe1df9ed883/tofuwufibozuparox.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/7725980838.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/gamuwuwebawoluzik.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/4caf3b18214c1b808bf835969762e3db/34757586616.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098423bc46ca---47007746052.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/nutunanoguzefoliwum.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d24595a319638104471a580546d6b55e/81289841862.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/pc42mrdfi71ofatme2rehvic00/sisozoxedumirotuwilolasal.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e46dc8e46f---24006109054.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/2deb390adc96123c219f4724c1a3fd99/45667328028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=fellowship+of+the+ring+free+streamPDF 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_off0000e5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A6 10868 bytes
SHA-256: 050e3dec271416c27b7926b3d89a17221cebfb77a5667eb8640d56fa92ac0aa8
font_01_sfnt_off0000fe9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9E 2572 bytes
SHA-256: a75326c30f122f9bc917b014de450c5d4b1e6d3a05160bde8aa9bcffc6cbbbbc
font_02_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 19776 bytes
SHA-256: e4725a55f564a76c5f52fdd4dad109201efa40a8072d70a28224f340aaea54ca
font_03_sfnt_off00013b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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