Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a9cb50e4ab581c…

MALICIOUS

PDF

67.2 KB Created: 2021-01-31 21:22:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 2f81354534bfd6daa104dad36adec8c4 SHA-1: ecf931291c28791b39313f42f04c71d1ff3e09e3 SHA-256: 02a9cb50e4ab581cb54517d7fd8973c5208d3a4332cc4fab290a7d0332e3e828
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/123?utm_term=reading+pa+craigslist+personals PDF link annotation
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7765172.pdfIn PDF document text
    • http://cocobuka3.xyz/milk_chocolate_brownies_boxzdtb3.pdfIn PDF document text
    • https://kazowutulegopos.weebly.com/uploads/1/3/5/3/135324393/lelefonotubozar.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/dicnjjT/bingo_themed_party_decorations.pdfIn PDF document text
    • http://tersq.space/64636013027fb8ra.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/9717766.pdfIn PDF document text
    • https://zuramuvo.weebly.com/uploads/1/3/4/4/134480672/85c8b75b68db.pdfIn PDF document text
    • https://cdn.sqhk.co/jivobukafon/xPWQiiX/5893852637.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/jwheeia/brooklyn_new_york_visitors_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/qalRXhi/72090163527.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/giiDRhg/naval_special_warfare_officer_continuation_pay.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/wuniku/moment_js_format_date_string.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/8907341062.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/font_blenda_script_font.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/wallpapers_4k_ultra_hd.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_off0000c8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 5248 bytes
SHA-256: e6a3f0433b83653a09e0be49e22533539ba72cac03d390689d9e1c9a3ed6d6df
font_01_sfnt_off0000dae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE7 10356 bytes
SHA-256: 8cab180ce40cdcdcb8732ab44cf9af77760cf71b88e09465637b7d50d99b4fac