Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2710fb5380c1ed8…

MALICIOUS

PDF

92.4 KB Created: 2021-02-15 03:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 56bcc97ce93e04d3cba1dbf0cf95421b SHA-1: 63c036bc653a72499bd25b628360e0ae1169cf2e SHA-256: d2710fb5380c1ed837b1435530b23477e93ae9900354873daa25760bd3dd580b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=rab+ne+bana+di+jodi+full+movie PDF link annotation
    • http://gufutaca6.xyz/52508472102951c4.pdfIn PDF document text
    • https://cdn.sqhk.co/juropenux/FioDhil/kavirakebejagatisa.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/wezapomanipukelos.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/7e465b38f.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/pggZC7Z/my_smart_blinds_kit.pdfIn PDF document text
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/5994613.pdfIn PDF document text
    • http://zinuxuf.22web.org/dexexasel.pdfIn PDF document text
    • https://cdn.sqhk.co/xikesurufa/ggg4hbB/74618344468.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/jjLGggi/89952608822.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/Fsqhfgi/fuwuvuvewovugokidalebanoj.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/vufuzewasi/first_or_second_b_notice_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/gufogegunofulu.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/42544208231.pdfIn PDF document text
    • http://favekagopu.epizy.com/issue_log_template_sample.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 5064 bytes
SHA-256: d341c6f6e3faa2a607e84c6b8254dd7d11de8b06f80c94f60de8c5bbe61c7c7f
font_01_sfnt_off000127e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E1 12088 bytes
SHA-256: d21e69d5363a261a4e962d5a9468adfd979e0662c938796ee14814d4dee3a085
font_02_sfnt_off00014f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2D 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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