Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c8267292f0b469…

MALICIOUS

PDF

76.9 KB Created: 2021-05-11 01:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 930b55579bfdfefc242c52382cb96a36 SHA-1: 22df83b26612c6d6b278f80dd5996b5901acafb4 SHA-256: 95c8267292f0b4692ab7e522fe7add0edabf1bda6a50d046a0e1555d1c90a941
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized PDF files, suggesting a link farm or phishing lure. The presence of a redirector URL (https://mezovuduw.ru/strik?utm_term=producer+examples+ecology) further indicates malicious intent to direct users to potentially harmful content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/strik?utm_term=producer+examples+ecology PDF link annotation
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/luzom.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/jaxap.pdfIn PDF document text
    • http://vituloza.sportsontheweb.net/small_is_beautiful_francais.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/business_analysis_valuation_using_financial_statements_4th_edition.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/modelo_de_aprendizaje_cooperativo.pdfIn PDF document text
    • http://gikikobudip.22web.org/critical_discourse_analysis.pdfIn PDF document text
    • http://bijivarudigodig.iblogger.org/jabaxilufanifuzogumajul.pdfIn PDF document text
    • https://nexawukuvinu.weebly.com/uploads/1/3/4/5/134578226/joranojuvo-tosojadanu-vubevolik.pdfIn PDF document text
    • http://kixetojonomezad.22web.org/20176916144.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/scag_turf_tiger_2_52_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xajowu/hitman_blood_money_free_for_pc.pdfIn PDF document text
    • http://manugefax.epizy.com/pib_budget_summary_2019-_20.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/brilliant_earth_diamond_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/ruger_blackhawk_pellet_rifle_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/rawijixopagekaz.pdfIn PDF document text
    • http://lobakixadob.epizy.com/69287333623.pdfIn PDF document text
    • http://diwokisames.rf.gd/61773321785.pdfIn PDF document text
    • http://wififeju.atwebpages.com/how_to_use_safety_1st_humidifier.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/wasukasapowelolesa.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/xutigalaxemi.pdfIn PDF document text
    • http://xorirefojexo.rf.gd/kcse_biology_past_papers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAA 5564 bytes
SHA-256: d7c9c4bc367a7bfe935660e5476a79a7d9c70b15ca0405a229fa8fcd39f681eb
font_01_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 11424 bytes
SHA-256: be181e02c51a064787b40debb3110a7e1cf477deeb89d1fc8eeef19127b60eba

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