Malicious PDF — malware analysis report

Static analysis result for SHA-256 229911265791370f…

MALICIOUS

PDF

81.5 KB Created: 2021-02-12 17:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 561bdcf91daad2ab5e9b94b75635d9c6 SHA-1: 046c6a2c0565f72060fc137a1ac46f9b6045d977 SHA-256: 229911265791370f571b40f5c62afbf95d712db894c04aca259fb50d5980e205
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous external links, many of which are part of a link farm, suggesting a malicious intent to distribute content or redirect users. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update, a common social engineering tactic. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of external links and the lure heuristic strongly suggest a phishing or malware distribution attempt.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=last+sacrifice+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416802/normal_5ff9267fe72fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382418/normal_5fc989c100828.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/Dghwjf2/beautiful_widgets_pro_v5._7._8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fdf025d4013a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_5fcdd6516a6c2.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/gghhegf/square_edge_painter.pdfIn PDF document text
    • https://cdn.sqhk.co/pafowijexube/ghic8if/vr_basketball_shoot_3d_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453721/normal_5fe58aeb50c5d.pdfIn PDF document text
    • http://togezapavux.iblogger.org/sembaruthi_sembaruthi_song_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_5fc9a4bdb19ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387226/normal_5ff7ac731b3a8.pdfIn PDF document text
    • https://vixevugipun.weebly.com/uploads/1/3/5/3/135327752/nuworiwekibitezojumi.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/PGhg9jd/kpop_store_usa_atlanta.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/6348083.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudujufilax.epizy.com/fallout_4_ps4_trophy_guide_and_roadmap.pdfIn PDF document text
    • http://dadojusox.epizy.com/weruko.pdfIn PDF document text
    • http://siwojanapav.epizy.com/joomla_template_3._x.pdfIn PDF document text
    • http://koxosam.rf.gd/jabees_beebud_user_guide.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_off00010224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10224 5180 bytes
SHA-256: f71230a381f7660eb95d0eb60fada348d5f12cee6e86e4fa3baa5089e6120125
font_01_sfnt_off000113e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E8 10788 bytes
SHA-256: 44f3ba198340b4cfd334ef80f9e137f3fd2258a884d6eea48e973e50b6d1653d

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