Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f335928f06ab278…

MALICIOUS

PDF

69.9 KB Created: 2021-02-19 05:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5a6cc7b272e3a78a36fe9511e2dca08a SHA-1: 965b2cf610228874e1c01996a00980659d5f9229 SHA-256: 0f335928f06ab2781797b4350288c22fa1307ddd3d5190008a83eb078848ce58
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://maypoin.ru/123?utm_term=afterglow+ps3+controller+pc+treiber PDF link annotation
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/6438668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501201/normal_5fc61236af646.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/i3jfiaN/godojil.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/egdXiiP/shaq_fu_a_legend_reborn_switch.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/zatizafovejip_fedopefebozuba_bofili_tikabekuwopo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_6014b44bb1312.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_5fe529301979e.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/bipawuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_6010382e6b8f8.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/jAKhbhe/gejomeragefojotip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fd6119f371c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5fcfb03b685d8.pdfIn PDF document text
    • https://cdn.sqhk.co/nalogigoke/ijijTjf/baby_yoda_wallpaper_4k_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/idjjFj4/watch_the_ball_drop_in_times_square.pdfIn PDF document text
    • http://logoped-samara.ru/1963992507038dwn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426676/normal_6015fc2557090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fcacfc099b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_6022220d93620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59D 5360 bytes
SHA-256: 71219880360a56131a36a3f0360832dd548cf5e3d5a0add6cf73ebc098d1f03c
font_01_sfnt_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 9956 bytes
SHA-256: da582cc502f932e2a440a022c359159ff0c4a5dc6e34f59a8922111839ade41b