Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bd6e0247224d40…

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 00:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cf79d2861bb748f87b99619661251dea SHA-1: 9e1f46ddba7295b2f6cd7733ef6161d6fcda3c51 SHA-256: 32bd6e0247224d402bcbb0c01b6aba86c73e2674add9c373d046da83874b994e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites hosting PDF files. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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 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://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607501f5dd708---35537888098.pdf In PDF document text
    • https://fallsplat.se/file/65364659157.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/d51286ad7e75a59d25719c8c14b92dc7/7431014419.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607460f6a117a---64382177623.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/vasusupek.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4c1c54aaa---15795673853.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/45378925737.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/da2a0c6db9a5b8c95fcf243c59c67473/24225205026.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ccf3f18b960a1911edb8d434bc727f41/lazoz.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/28f19bcaf2acfae8d7c9c10a5fafe976/97152681832.pdfIn PDF document text
    • http://splogservice.ru/content/file/vufofuvaninotapuxisifujan.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/gipodatejigagujezifurem.pdfIn PDF document text
    • https://infotechbg.eu/file/71536759816.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608023e74fc93---84910380377.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aee2077670bf32b50ad5077592b8040d/64188526051.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/tazutabojinir.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5130820e1---91780190910.pdfIn PDF document text
    • http://cascad-trans.ru/files/jikabovasebixopekivabo.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075de3a04a01---fulurafesaxov.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/338af6782f1b0709ff2162f87d5b3d9a/557774395.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///74826649816.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/rumuvuzuxemuviz.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/bacf71eb99e6ef96ff42358eed6af8c5/bileduwekizijeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+convert+pdf+to+word+in+foxit+phantompdfPDF 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_off0000db81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 17516 bytes
SHA-256: eb915f057fe9ee07fb5989b89d00415e7bf3f8ef18b23e0f3edb795512977bf5
font_01_sfnt_off000108f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001210c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210C 10916 bytes
SHA-256: 784af6c3e3cc03bb6d8fcf9e21580d8fd1756e27464833065b60768ad6850710

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