Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7a4bfb4916d3e9…

MALICIOUS

PDF

71.1 KB Created: 2021-02-05 12:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8d18a2952d2a2b5247d12006e7a94d77 SHA-1: 5469c1bd23737ea4b44816c64e012c6ef884645d SHA-256: 1a7a4bfb4916d3e97d0751d7b1fcc689099b83cd0f3f4a4e2e9c775cfa19aa30
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://leonvi.ru/wb?keyword=bahubali%202%20movie%20tamil%20full%20hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fca3a14b1eec.pdfIn PDF document text
    • https://tulixepatezapik.weebly.com/uploads/1/3/4/9/134902644/3765615.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/dajisur-raxubagogiguzi-ninopiv-bijebomazuvid.pdfIn PDF document text
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/koxubijapuwiduna.pdfIn PDF document text
    • https://malekijewa.weebly.com/uploads/1/3/0/8/130813883/xuzap.pdfIn PDF document text
    • https://ximewenidurap.weebly.com/uploads/1/3/4/6/134651426/2673717.pdfIn PDF document text
    • https://gosopitodemeku.weebly.com/uploads/1/3/4/8/134874694/joxufafipejizoneta.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/181105.pdfIn PDF document text
    • https://luxederobidurip.weebly.com/uploads/1/3/4/6/134603039/7e0b93.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/tarafomopaj_xatuguweso_zilidefusakog_famad.pdfIn PDF document text
    • https://wisevagidigo.weebly.com/uploads/1/3/0/7/130740356/dirokoki.pdfIn PDF document text
    • https://bobifadilow.weebly.com/uploads/1/3/5/2/135295989/4409789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb4a35175b7.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/kizugokofo/scratch_3._0_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/vapubokezakidokan.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/career_path_for_performance_tester.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/89578420571.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/ftp_server_windows.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_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 5252 bytes
SHA-256: 9a2ad218b878977887b9c8f03492af6b9e05f2a08cd218bf9bdcdc47d593d903
font_01_sfnt_off0000e945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 11660 bytes
SHA-256: 3ca774111099ba3a8d73b190d825231b907215be6b5ea5939b304404eb59b9a9

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