Malicious PDF — malware analysis report

Static analysis result for SHA-256 780bae22f947af41…

MALICIOUS

PDF

78.6 KB Created: 2021-04-05 13:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2e44d4e6cc5466d8ac1b8e6734395e95 SHA-1: b44b051700fa36e9a2d772fe599cd25f8ec59ac4 SHA-256: 780bae22f947af410cea97b0f34ddce1c1bf638b351a20e3338d74fe737cddbc
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 0.9998

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://xajibur.ru/123?utm_term=baby+boy+pictures PDF link annotation
    • http://alifan.store/psychic_self_defense_for_home_and_officehib54.pdfIn PDF document text
    • http://gowitobo.iblogger.org/78791981804.pdfIn PDF document text
    • https://samugunu.weebly.com/uploads/1/3/4/7/134701516/9028287.pdfIn PDF document text
    • https://pekiwuvigefarov.weebly.com/uploads/1/3/4/7/134766825/91a842bba42f4.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/xuniduzufur.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/miwewe.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/d0777be02813241.pdfIn PDF document text
    • http://chisto-chisto52.ru/tonenovikuteraramijikof5o75r.pdfIn PDF document text
    • http://farvestnn.ru/transition_words_exercises_with_answersbvt19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/zotuxakupikoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88d7e41-062f-45cc-8f1b-fe5c252400f4/15765853177.pdfIn PDF document text
    • http://lowavizoviwu.epizy.com/lisizijodu.pdfIn PDF document text
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_f839fb0279214264b3840907bcf84b90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goneduzum/zituvasagajepobadowam.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_4d026b6bfcbb4dc08340bbd5b7231215.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/self-mastery_meaning_in_arabic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20367e2e-997a-43a8-8dbf-2b98e35b1ba8/60835545171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d6afc7-150e-4165-989e-0a480ad8ae92/50097253667.pdfIn PDF document text
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_0d8700f6f4d24c59a2d9794cbd63b17e.pdf?index=trueIn PDF document text
    • http://vegozamefokim.rf.gd/dofeta.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5184 bytes
SHA-256: 3a8f1eeb51172f74afc4492ed2ecb1cd0f27b6c65ad89797bd27095803477259
font_01_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 10728 bytes
SHA-256: e8399e393e25e010974f2272518d9e42f29f841dab5d669d27305377fbf20269

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