Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4645fed1c5359a3…

MALICIOUS

PDF

66.0 KB Created: 2021-01-29 02:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8128c88474bf48241f8b468434b80fa4 SHA-1: 704d36f8ab4a27c7a8b985a87b01718b7f5c04a1 SHA-256: b4645fed1c5359a37c79e85ac1e3c7be55a0a403d013ab4e38efe1ecb44b6269
164 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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/aws?utm_term=chamkila+song++djpunjab PDF link annotation
    • https://cdn.sqhk.co/bagojenul/e8VMQgf/duvubawepara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fd8f1b8da1df.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/J9wUMgj/wallpaper_black_shark_hd_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_60133e3ba64f2.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/fje2gf7/craigslist_los_angeles_california_motorcycles.pdfIn PDF document text
    • http://bonus332.site/mabazelalp595.pdfIn PDF document text
    • https://jokasagumejede.weebly.com/uploads/1/3/1/0/131070006/618e6b1ee6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5ff51e85a0659.pdfIn PDF document text
    • https://cdn.sqhk.co/senosekagoko/j6ifhc4/underground_racing_rivals_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/besawevij/hU1jagc/wild_duck_hunting_2018-_19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467007/normal_60017f863bf76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_600e60a876193.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407724/normal_5fe5d88ca4d03.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/hbifji4/roomco_chat_rooms_date_funny.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/fatuvegix.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_off0000c529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC529 5464 bytes
SHA-256: b22c4f441ebdaab6f2611fa31a9593ed80e4aa39942a0a93b400ae5bc19cf516
font_01_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 10620 bytes
SHA-256: 8ec93f7b3af7ea589a2c861929b0866c34c2c70d41819ef2d9877ce610454366