Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92fd49445b4c94a…

MALICIOUS

PDF

72.5 KB Created: 2021-02-21 05:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c0e6d1bed4f11eb4c957884e60f50349 SHA-1: 70db74cb01bf5c5ab9c6c9190cfe7a5e4a079183 SHA-256: a92fd49445b4c94aeea35c3ce47829f22975a6f4ce2d9315ae818d1921777156
196 Risk Score

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.
  • 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://bologen.ru/wix?keyword=special+angle+relationships+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/padasagam/ahdJgch/titufafodubunovemufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_600be39f93c85.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/sipag_revoli_neleziwuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fdbe3abca296.pdfIn PDF document text
    • https://nefadojajekewa.weebly.com/uploads/1/3/0/8/130874163/judeno.pdfIn PDF document text
    • https://nomalepizu.weebly.com/uploads/1/3/1/3/131398516/jojonono-zipel.pdfIn PDF document text
    • http://reestr.site/49706334442nptkd.pdfIn PDF document text
    • https://kogexabisuzim.weebly.com/uploads/1/3/4/3/134322867/625615b730ca5.pdfIn PDF document text
    • http://secret-empire.ru/red_alert_4_download_full_version_pccpkcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402718/normal_5ffc27a7d89e4.pdfIn PDF document text
    • https://wadenipix.weebly.com/uploads/1/3/1/4/131408068/5497682.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/panokojol/72257540865.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/expanded_notation_worksheets_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/96152794069.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/lamisa.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/diablo_3_season_19_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/zozilixemupilebotenejuve.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_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 5676 bytes
SHA-256: 1af93705f0422e85934c989267358f9248a3c8779dafc1bfa9449674d89c90d9
font_01_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 10252 bytes
SHA-256: 14929536abdc9836f51c332ddede52fb6f0a84aeb4a5e1c78c1c3e79048947c7

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