Malicious PDF — malware analysis report

Static analysis result for SHA-256 9918ba5a7806dd5e…

MALICIOUS

PDF

90.1 KB Created: 2021-03-04 01:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: bb2af284b38ca5c66d63f4e33d84cc41 SHA-1: b132dac3e0709dd057d0210da9154c7705718c2d SHA-256: 9918ba5a7806dd5e78f67f56ea4ca81a55ce3077cbdbea92421e508787dc6c57
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links pointing to various PDF files hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

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://baarspo.ru/award?keyword=shakespeare+sonnet+116+explained PDF link annotation
    • http://raxejudesezix.scienceontheweb.net/final_fantasy_tactics_strategy_guide.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/wapumorib.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/what_is_the_dominant_theme_of_the_yellow_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/hbgjGj7/tepowotufokigejumuvapa.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/20799398336.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/5ChfQhd/19844462518.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/rudimijegivoneg-laruximok-jesenasife.pdfIn PDF document text
    • https://bovuzujavus.weebly.com/uploads/1/3/5/3/135326818/redumufiwisoxof-bokexixisugi-zifetekekizen-pawufuxamuf.pdfIn PDF document text
    • https://kuwuxezito.weebly.com/uploads/1/3/6/0/136090431/jemedezarifa.pdfIn PDF document text
    • https://boliminukedakos.weebly.com/uploads/1/3/4/4/134494229/zuduvusi-retikaji.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/kogovejurizor.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/97e55fc33.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/rigghlZ/siberian_husky_price_in_kerala.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/senilopomu.pdfIn PDF document text
    • http://newowoliso.iblogger.org/mechanical_engineering_internships_summer_2021_pittsburgh.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/how_long_to_cook_cubed_sweet_potatoes_in_crock_pot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sovewegupafipiw.rf.gd/victorinox_swiss_army_watch_manual.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/mossberg_930_spx.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/walumad.pdfIn PDF document text
    • http://pefafimu.rf.gd/92509320915.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_off000123db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DB 5488 bytes
SHA-256: 0485cd12a26e8a9d1d7f9d693d539042d54bc9b2cbd440f5d86999baccd08d82
font_01_sfnt_off00013684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13684 10736 bytes
SHA-256: 349121b444f63aa8e7b6dfa9c835993e3d0acd35b3b28a109d5bf0146c9edbaf

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