Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa18493d2ec37b8d…

MALICIOUS

PDF

90.1 KB Created: 2021-06-26 06:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9f4ee35c7c3e0ad1381be7e34ada9452 SHA-1: 636cb7375c6bec16a9114623f856dc7e3c87cd06 SHA-256: fa18493d2ec37b8d79c36c57cbbd9fa3ec2022de137f048485fe5f4b9e44891e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=the+lottery+analysis+pdf
    • http://ecohort.com/userfiles/files/geresuvuku.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/02b379eb0d37419599fa530352875e3f/27843753675.pdf
    • https://guruamardaspublicschool.com/userfiles/files/nuzup.pdf
    • http://terralis.eu/catalogue_dynamique/file/84021818007.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae974e149---ranavedilupakonidilimutup.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3cb9c09fb4cf510e6e8483154ea8f263/32113324571.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/527f5943c3b05e51a0f81931010345aa/85426581615.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/ropebevitiditaburado.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b188f94f90---73599837242.pdf
    • https://kltccompany.com/ckfinder/userfiles/files/kezivunuwawonatolonada.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/daa352e7f80cbcfe7afc1345fa16447b/dugipesematetiz.pdf
    • http://whs1979.net/clients/65916/File/fepivexowefenoxujolese.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/fda9337b3f8c7a64e637d08e826f4c77/witanarijagugumemupus.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/01od9vlva5c7bsg532ngc0ruf9/mutolasidibadusuvopomilit.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/hlinfmg5m6l1uelge90a6m26o4/57721667815.pdf
    • https://healthmatters.me/userfiles/file/gilesebokedosufa.pdf
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/3604bb67ee37737aa49acf180a4b064b/todin.pdf
    • https://all-stage-meditation.tw/uploads/files/60b9312382dbc.pdf
    • https://abugfreemind.com/userfiles/file/80646802203.pdf
    • https://klairtransport.com/uploads/files/gomojofavebibet.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/83a53f60240891a87be7f54711d738e8/kimufobodasovetemo.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607636a03b026---zukuxoraxozawepizelawural.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/f256f0ccae3d8ff93c6c5516497f9f14/99373994048.pdf
    • https://caribemed.com/userfiles/file/47633296090.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d9.bin
d800322c57d9faee18b7c9478dc287b2c74059ad7211381ea06e49033527be94
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 18076 bytes
font_01_sfnt_off00012953.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12953 16792 bytes
font_02_sfnt_off0001416a.bin
28c745da641b3ed616807a5d7934efa517db59b3d81947e6b1993ee0ad9e2c76
pdf-font-stream PDF embedded font (sfnt) at offset 0x1416A 10672 bytes