Malicious PDF — malware analysis report

Static analysis result for SHA-256 9097c163c536972f…

MALICIOUS

PDF

83.6 KB Created: 2021-03-15 21:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 269a1b95f1e93ea5fad1a823e24beeb9 SHA-1: fc519839b9b13ce2c44904818674b24510bb17bb SHA-256: 9097c163c536972f9415b8ba92631a184bf1552cc2f4a48db3505415e9eeede7
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a phishing or content-distribution attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=mental+status+exam+questions+form PDF link annotation
    • https://cdn.sqhk.co/dabigewom/igchhhg/black_ops_cold_war_alpha_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lebinezekoma/2hhNUjb/23366792621.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/a2rhfij/.pdfIn PDF document text
    • https://lugukeku.weebly.com/uploads/1/3/1/4/131407734/ruxezanuvowuwur.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/Lzhcgje/64155883000.pdfIn PDF document text
    • https://dexejajakoto.weebly.com/uploads/1/3/0/7/130739268/3145640.pdfIn PDF document text
    • http://sungo1.space/british_airways_highlife_magazine7k32v.pdfIn PDF document text
    • http://reduslim-buy.site/25262575349wsv53.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/iaMKPig/35165866757.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/wjghdji/escaping_the_prison_2_games_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/Rgejcgc/athens_information_technology_university.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/disability_support_pension_increase_march_2020.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/7859303.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/44464677340.pdfIn PDF document text
    • http://liolika-rsya.ru/wulerevabojowenibosutezizype3l.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/vubugemoteniwujoziko.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/hibgeGZ/30646142735.pdfIn PDF document text
    • https://nunavataregexo.weebly.com/uploads/1/3/0/7/130775742/3ea9a27.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/jj3uHhg/5726935320.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/ibo6gcJ/65978901732.pdfIn PDF document text
    • http://cmb-accueil.com/is_skyworth_tv_goodwti2q.pdfIn PDF document text
    • http://vawabipoxe.sportsontheweb.net/norcold_fridge_not_working_but_freezer_is.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/QqSjeQR/tipazonixelap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rurebafib.onlinewebshop.net/how_can_you_make_him_fall_in_love_with_you_again.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 4992 bytes
SHA-256: bcef898c349c3b64c58d3e437e43bc1f25c50acf93f3e3290cc112698fbf80f6
font_01_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 11640 bytes
SHA-256: 7f720ea67ef1a0a1402745f625c3376a6a1bd4c9ad16d29063d1267ebfeb3bb2
font_02_sfnt_off00013268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13268 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e