Malicious PDF — malware analysis report

Static analysis result for SHA-256 b717f87865f77570…

MALICIOUS

PDF

62.8 KB Created: 2021-02-12 07:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f603ea8d813e6b378c50cca9f9c0691f SHA-1: 77c297eb6c4800baf7a564c7e530d96df50e9ba1 SHA-256: b717f87865f7757018a02f429b59e9eeaf82b8e6b7eceac8b76f9209803d174d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=coniugazione%20forma%20attiva%20del%20verbo%20vestire PDF link annotation
    • https://cdn.sqhk.co/nakijalufiw/Uhecjfz/61595840364.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/jbicgiw/69086467602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445869/normal_5fcff5fbe39d3.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/ehdygdE/56261906483.pdfIn PDF document text
    • https://pejegenipejixe.weebly.com/uploads/1/3/4/8/134848799/mutaxedu_kidovolud.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/ggwiidj/love_art_sushi_fenway.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390056/normal_5ffab66a52ff5.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/8c80ef2a62c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fdbd63179166.pdfIn PDF document text
    • http://nonly.xyz/824412044505v7dm.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/g4Vhjhf/parachute_chicago_tasting_menu.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/wanasuvedigo/kifebedirunuj.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/duzusadisamogoliwug.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/riralesuroxajeduwivoxuloj.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/energias_renovables_en_colombia.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_off0000b874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB874 5384 bytes
SHA-256: 8c3e38aab96d189afc5d52826543ec637923b84cae0af5c1a19b6d73f0bbbabc
font_01_sfnt_off0000cab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB9 10676 bytes
SHA-256: dee595ae9a50222f93dc3f2b6a4e03181c871f0b3eb6fa30f7fdd780187e7bb0