Malicious PDF — malware analysis report

Static analysis result for SHA-256 56117f0a26f41f24…

MALICIOUS

PDF

85.2 KB Created: 2021-02-18 03:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4764573e6110cc08f10225f1a847482c SHA-1: 8a4efffb1144d346efcc2c2b5226431ac848b6a3 SHA-256: 56117f0a26f41f24c198600320b1aef1e5ad15183e7e2dd6d03a7ed197139f4c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://seumenha.ru/strik?utm_term=bhagavad+gita+quotes+on+karma+in+sanskrit PDF link annotation
    • https://cdn.sqhk.co/vilonunufuk/haYnifw/best_archer_armor_minecraft_dungeons.pdfIn PDF document text
    • https://lafefetakizin.weebly.com/uploads/1/3/2/7/132712235/3053900.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/xuxelakiguvasad.pdfIn PDF document text
    • https://jemexegotida.weebly.com/uploads/1/3/4/4/134464186/5737967.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/6501415.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/gigheA5/bibodoremiseregabo.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/tibegaxekane-loxanemovizif-zuzalizusewoj-vexexujujud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490273/normal_5ff75801c78e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bezopiwuzalobit.rf.gd/75132470156.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/95698713662.pdfIn PDF document text
    • http://sunutexik.epizy.com/jokadubilafu.pdfIn PDF document text
    • http://nafakosoleg.epizy.com/mozilla_firefox_quantum_beta.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 5508 bytes
SHA-256: 74f0e9495ea5c89dcd1b8c0df4bb006e6470a1ab93800e162be7599ef7d3987c
font_01_sfnt_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00010fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE6 11588 bytes
SHA-256: ac2ca180fc039164124f429a435abff8b0e2dd79fd8d4e00d97b897b94f9b4da
font_03_sfnt_off000134e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E2 5072 bytes
SHA-256: 09510f2d01c9a4093cef6f7af449b81d982b2d5bbc43bd5dd0003c62dbe2f910

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