Malicious PDF — malware analysis report

Static analysis result for SHA-256 985fa1aa1477d935…

MALICIOUS

PDF

76.2 KB Created: 2021-03-03 02:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a27773f5138dc304e253bc01f96e1306 SHA-1: cc48cad72ff9eaaa96cb5a0860ebee61f5f7049c SHA-256: 985fa1aa1477d935be1b6d3f76a0fdd9392db2c20f24068766309da7503fec32
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=2012+vw+tiguan+transmission+oil+change In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_60352099efefe.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/gehcjix/nick_jonas_movies_name.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450907/normal_6001b8a1c9f7b.pdfIn PDF document text
    • https://cdn.sqhk.co/wibezudak/5sygdhh/free_ff_stickers_packs_wastickerapps._com.pdfIn PDF document text
    • http://bella24.xyz/mewozesidebetazenugegiwou7pg8.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/fdZjxyd/mowiwari.pdfIn PDF document text
    • http://ridunculus.com/customary_conversion_worksheet_word_problemsje9qg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_602b430909b17.pdfIn PDF document text
    • http://nakrutkavk.site/instagram_dark_mode_androidd11a3.pdfIn PDF document text
    • https://lugijuvumefabi.weebly.com/uploads/1/3/4/7/134761930/d822087ff1f66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_5fdf96ff00e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuvegox/hhcihtj/tajomowigomasezemos.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/fiaeX66/zadofufipi.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/IWfjjRd/64501060785.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/djjidQU/multiplayer_tower_defense_games_android.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_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 5596 bytes
SHA-256: 24c181be113ebc0181dc2a08c33857789934bee480714a9e85323d29c831fac0
font_01_sfnt_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 10328 bytes
SHA-256: bbf8bb5c385b42c09203826fc6fe69d6a6320d44d68cf8bc1b36bf40395f182d