Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6d8cfdbf08f6d0…

MALICIOUS

PDF

76.0 KB Created: 2021-04-05 17:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1ac9dad9ba64f66a838007b6b5c81081 SHA-1: 493f7cf1c299e5527f8116c860cf2652de3e9602 SHA-256: 6f6d8cfdbf08f6d01a6fa970ccfa78b1eb45ee28271b6e1ce37c23a84f6694c9
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to reprogramming a Genie keypad, which is likely a lure to entice users to click on the embedded malicious URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=how+to+reprogram+a+genie+keypad PDF link annotation
    • https://jonozexogu.weebly.com/uploads/1/3/4/3/134357932/nivuke.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/kiram-sagogo.pdfIn PDF document text
    • http://vehicleinsusa.com/mitizaxovuzejopokudoberesykjl.pdfIn PDF document text
    • https://sojofiveku.weebly.com/uploads/1/3/1/6/131637763/kitavexukuga-mobeziwuwujedag.pdfIn PDF document text
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/gemoxegujibuxevofup.pdfIn PDF document text
    • http://spainwow.pro/6245834168kfbhu.pdfIn PDF document text
    • https://vatubovelogised.weebly.com/uploads/1/3/4/3/134375195/3034037.pdfIn PDF document text
    • https://wugabatove.weebly.com/uploads/1/3/5/3/135318753/f58ac9d.pdfIn PDF document text
    • http://igme.site/netobavopekumonamkkbmx.pdfIn PDF document text
    • http://lofitner.buzz/alpiste_lactancia_materna_unicefrb7h6.pdfIn PDF document text
    • http://wegisinebirixe.iblogger.org/zrana_luka_zagreb_informacije_kontakt.pdfIn PDF document text
    • https://japipimimobuxi.weebly.com/uploads/1/3/1/0/131071183/4718fcfe69.pdfIn PDF document text
    • https://bojowavezuzabi.weebly.com/uploads/1/3/1/3/131382797/pevit-tolofejobi-besuvonef.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/speak_your_mind_2_download4crkp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_9018db450e5b4bf7b381ffa40a3ee7bf.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_09a8da3d64ae4b50b35df8db79d19055.pdf?index=trueIn PDF document text
    • http://tefefusojobus.rf.gd/machinarium_free_full_version.pdfIn PDF document text
    • http://ranigaviweriz.epizy.com/22172077371.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_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 5288 bytes
SHA-256: 60a86a78366d778f2173627a0015cba81fb4e2e893f842aa7c05283e7963b9d8
font_01_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 10852 bytes
SHA-256: f0a970390c1d7171036b724a2844893bbeba51e21deed9a85c5c19ff849dda2b

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