Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0aa3b0fdca0cb4a…

MALICIOUS

PDF

78.2 KB Created: 2021-05-14 10:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cc6257e414d02918b8ea85e1c4d363ce SHA-1: 46bcc62ac66531d61918c5457550d6fa5a9e7e64 SHA-256: e0aa3b0fdca0cb4a1813c32b19ded5e0c1c719a52d605347d10ec6bee9e5f6ba
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://seumenha.ru/strik?utm_term=why+is+my+smoke+detector+flashing+a+red+light', appears to be a lure for users searching for technical information, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=why+is+my+smoke+detector+flashing+a+red+light PDF link annotation
    • https://munuliwakubife.weebly.com/uploads/1/3/1/6/131637312/bajug.pdfIn PDF document text
    • https://gigotuvo.weebly.com/uploads/1/3/1/1/131164366/pajaguzel-xidofuwu-lumulo-rimototiwido.pdfIn PDF document text
    • https://pakidezosatujij.weebly.com/uploads/1/3/0/7/130775723/506459.pdfIn PDF document text
    • https://lepabamun.weebly.com/uploads/1/3/1/6/131636917/bdae7706afc6.pdfIn PDF document text
    • https://cdn.sqhk.co/goloravevi/hiCEQif/96450272958.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/PGuw8ig/jawes.pdfIn PDF document text
    • https://sefariduzaki.weebly.com/uploads/1/3/4/6/134665623/nudiguvawikilowonixa.pdfIn PDF document text
    • https://panonalosisewe.weebly.com/uploads/1/3/5/3/135316392/gumivorafupebi.pdfIn PDF document text
    • https://cdn.sqhk.co/mizipudi/ggjgcgh/zatonetoz.pdfIn PDF document text
    • https://zosetujisux.weebly.com/uploads/1/3/4/2/134266291/julufux_gulojopi_tedudopolid.pdfIn PDF document text
    • https://cdn.sqhk.co/fepotifomowa/hicogef/vivelefuzudefulitatorevol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_841f0bd249ca444e968f157127917871.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_e718556fc1b4404aa762c74b15cf4d77.pdf?index=trueIn PDF document text
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_41de4acf00ac4001a8bfc18750855a80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/ford_3000_diesel_tractor_for_sale.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_73e8cec59f414408b8b868714e84752b.pdf?index=trueIn PDF document text
    • https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_68c031310a3f4357a42283087a44b19f.pdf?index=trueIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_df1ac45507924aa0a7fdbcd595358e3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xabalaru/detazulopuwuvuxiwak.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/jozugunuv.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/search_engine_optimization_google.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_b3e9ac296f704f898fe14f87a363db61.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_d66b053b4b434996a5ad45c81aea72ca.pdf?index=trueIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_0b98e4011fe849d2a91ef28d7b966777.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/13964143654.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_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 5616 bytes
SHA-256: fa96ad0f3b941a41e66c7333d7a55c7865f5303264fc546f0c293ea35d93ba07
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 10572 bytes
SHA-256: 1fd9768e29c80d55380f31f151004004f8d011e52ebdb71b79ef47ea7dba1ca7

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