Malicious PDF — malware analysis report

Static analysis result for SHA-256 7077c27767662e82…

MALICIOUS

PDF

73.0 KB Created: 2021-04-01 22:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5eb932fa83bcf6a9f27dde004698a4cc SHA-1: 5456a3686525a97ba7f24d89ffc52d96865cc15d SHA-256: 7077c27767662e82749c9955937b5f663e637046fa0b8433a0504afc16732404
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=medical+english+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424689/normal_6006c69c9ef03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5ff7db8c5e296.pdfIn PDF document text
    • http://jogegeve.22web.org/46996652937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_60399ecb799a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_6060954fc6ccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_602353ecb247e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_6027bc66b24cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_605a20d57b4fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5fef0b51df0b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_77a905c1509549dd947668edd7a0f43b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/308e0975-d632-47f7-9e8a-52d0bddec273/70825136393.pdfIn PDF document text
    • http://deroselewem.epizy.com/59458518507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9079964-4416-475d-91bc-3c91ad654f1a/gefelobexutuxemu.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_2dc1399f95d54bc6bc65a5e08c0dd089.pdf?index=trueIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_fae93ab544714722bc7b59a4b5ede7f2.pdf?index=trueIn PDF document text
    • http://nakulugexogi.rf.gd/engineering_guide_wow_bfa.pdfIn PDF document text
    • http://jitemawuvefogox.epizy.com/bass_guitar_major_scales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccb34a2-3fa9-449a-b32a-56e7ccdc46e7/can_vizio_tv_connect_to_bluetooth_headphones.pdfIn PDF document text
    • http://gazusoketa.epizy.com/87151941320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8f9270-a7d8-4734-8d4c-e0abb819d814/3635220502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46064c0f-d6f6-46e0-b228-9bdbd71f954b/55176170782.pdfIn PDF document text
    • https://2634c7da-0b58-4de1-95e3-ef2217a723ee.filesusr.com/ugd/f934bc_c4f0e28bf43744c0ab95865b9a61eda0.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 5528 bytes
SHA-256: e58c71821009b150d28943af78d7bcf58f171c8da2e09aa35f1971025562846b
font_01_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 10532 bytes
SHA-256: 3af5a176fd02651ba88207f0d91bc149b5afe88bf81e67e44ae315bb372f03a2

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