Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ad0d07259d99b7…

MALICIOUS

PDF

93.6 KB Created: 2021-04-27 09:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a461b4a31175394e38cf724244dda401 SHA-1: 46e84c93628a2dd370401a33996ca7af940518e4 SHA-256: a7ad0d07259d99b7f12d8ff61cbf28698a14a907b3e192cfe0e7bb253f59db6e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, containing numerous external links, many of which are hosted on disposable domains, designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to manipulate search engine results or distribute malicious content through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=genie+pro+model+1024+belt+drive+sprocket PDF link annotation
    • http://kudopifupelixi.22web.org/memirurepaposazunixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://19a4122d-28db-4ec2-a9e3-8c1e87f24dd5.filesusr.com/ugd/70d0b7_e693ff62faeb4ae99b9c8677de138a87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff4d840-ca2b-479d-95d6-5147132ef9ca/my_friend_dahmer_full_movie_online_for_free.pdfIn PDF document text
    • http://jirarawoxi.rf.gd/xelololarugudozovaxunosew.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_d56ca3c0245a48d68b17e8e797795fbb.pdf?index=trueIn PDF document text
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_7cca46c6cbfd43699891d577d602ff62.pdf?index=trueIn PDF document text
    • http://roronusosewurul.epizy.com/gunolasovutuwivitoned.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b740f703-a32a-4330-aa99-e18d1645e37a/cyberpunk_2077_ps5_review_ign.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_a16023440bd1428f9f67fca899600333.pdf?index=trueIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_9a84d98ca2a845adbd8559ac699b559b.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_bd6154fc3e6a4b8f9a86829a9f555fab.pdf?index=trueIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_34bee691727241eba26694ee49d1e62d.pdf?index=trueIn PDF document text
    • http://mujevevurisul.epizy.com/template_undangan_khitanan_ms_word.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_85b980a6b7eb4b88918b9d48d3c09595.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b9cfdc-dd5c-41e0-86b1-15a8eceb186f/bufomibugan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7862b77-3a38-438b-b684-46cb132da52e/storyboard_programs_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ac277a-96ec-4346-b53f-43df4b5312ee/magoximowakaronadilaj.pdfIn PDF document text
    • http://jatujij.rf.gd/25565204059.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_995bf4087b3240debf1c5a297e7148c9.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 3368 bytes
SHA-256: ac2b493eefdf779c8a4fa10c6196ebc7bb4d9cbea0da8d22363f12a9d3eb8774
font_01_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 5508 bytes
SHA-256: 9848b0d0450183152833fa4d06e6a35732f0714a7663726feb3f60c3fac5c90f
font_02_sfnt_off00011fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE3 10844 bytes
SHA-256: 77f1fb8b85991ea33d35252fb63e773e4ad627866fc2cc559e39928120efc2e2
font_03_sfnt_off00014510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14510 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c
font_04_sfnt_off00015a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A0C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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