Malicious PDF — malware analysis report

Static analysis result for SHA-256 722acbb4dd6af001…

MALICIOUS

PDF

70.2 KB Created: 2021-02-27 08:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 39e2f153799c70727177c54562399d03 SHA-1: c55e5facfc88560f3f9221ca4d3d2255130d74de SHA-256: 722acbb4dd6af0011e20b1bb5a4beec49312173c2719cb0a50266a4580d26c78
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://ponafet.ru/wix?keyword=ashrae+pocket+guide+pdf PDF link annotation
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/xebotupoge-runeninalu.pdfIn PDF document text
    • https://fesalepexixid.weebly.com/uploads/1/3/4/6/134660072/938402.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/065a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_602ef4c700389.pdfIn PDF document text
    • https://ziravejutit.weebly.com/uploads/1/3/0/7/130740001/8495044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368782/normal_5fcbded27e6a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5fd1f0679b4bd.pdfIn PDF document text
    • https://dubekanenek.weebly.com/uploads/1/3/3/9/133997540/mefepeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451039/normal_5ff499ff71383.pdfIn PDF document text
    • https://joriwonakogilul.weebly.com/uploads/1/3/5/3/135305945/6284132.pdfIn PDF document text
    • http://begdas.space/jagesubutatorogezuneduzfzimr.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
    • https://s3.amazonaws.com/kefodek/73616708733.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/baahubali_4_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/canteen_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/indian_national_army_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/best_free_android_civilization_game.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_off0000c95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95B 5216 bytes
SHA-256: e7c5eb53b91ee58053c7ea065fe89d209eee1eb42c260edcb9d252889875180e
font_01_sfnt_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 10192 bytes
SHA-256: 4c1cfa974e588f2137d6072431be5b42e6c999bd64b4394fb867bb8445c920c5
font_02_sfnt_off0000fe17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE17 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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