Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e2bb7d8955baff…

MALICIOUS

PDF

68.2 KB Created: 2021-06-05 18:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1dfa5b8ed75fcf75264a1d7ccb5650dc SHA-1: 0dc688d370f9f82b9cd0c82d59c3ee0c7398effb SHA-256: c6e2bb7d8955baff0b548f5ec5f61ce9660d7baca9e078a34cb166ae3b77f5d1
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. One primary URL, 'https://allytemp.ru/pbw?utm_term=spider+man+total+mayhem+apk+data', is likely the intended destination for users seeking specific content, serving as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing a second-stage payload or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/pbw?utm_term=spider+man+total+mayhem+apk+data PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452851/normal_6041c88b69d3f.pdfIn PDF document text
    • https://momitoxen.weebly.com/uploads/1/3/7/5/137514133/gonafanolagex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470391/normal_6060999ac70bf.pdfIn PDF document text
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/topoguvuwujale-josowifotapoj-zuluvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_6046e05e4a866.pdfIn PDF document text
    • https://vuxemirisem.weebly.com/uploads/1/3/1/4/131453034/kifajuxojulekoluf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5fc8a1587a783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_600fb57b861dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_6010b6862d091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_606676ba0f57d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotasaful.pbworks.com/f/gewedezotusopazekugilapen.pdfIn PDF document text
    • http://bavudexote.pbworks.com/w/file/fetch/144667746/actividades_de_pensamiento_matematico_en_preescolar_aspecto_numero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e6175b-9d40-49bd-b5d0-1d3d369accf3/bapenawo.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144475800/62101956928.pdfIn PDF document text
    • http://joraxakegeg.pbworks.com/f/83773625988.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144436482/43715869180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8009c7-415e-49be-aa6c-6b7c169b3efa/refowiwizedasezot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6ebdd5-3230-4f3c-9c9f-237985db4cbc/homelite_electric_chainsaw_owners_manual.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_off0000ce2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 5288 bytes
SHA-256: 4546c2acfd7dc6257f5508a241101e3139f26ec61bbb028864ce0048963f707f
font_01_sfnt_off0000dfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFF 10496 bytes
SHA-256: fcc82cf84020e9490f9d0d6d01fc548c10eff94d138c011107ca0f1b04700f8f

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