Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e132c0f1df7c45e…

MALICIOUS

PDF

84.8 KB Created: 2021-01-14 23:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ab0ec1dbaed3a82e58d5a010cef46cf6 SHA-1: c436e0ac651a52ba3d49923fc15613db066be3f0 SHA-256: 7e132c0f1df7c45e56d14cd94890e4ff5fe6088812f8c5b38bd15d4134f94d8e
244 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains and point to other PDFs, indicating a link farm designed for SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure at 'traffking.ru'. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution by luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://traffking.ru/aws?utm_term=baixar+jogo+de+dama+para+android In PDF document text
    • https://cdn.sqhk.co/megilujij/jbgjjbo/furniture_for_sale_springfield_il.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5ff2d76e9ab76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389370/normal_5f9666851d052.pdfIn PDF document text
    • https://site-1174552.mozfiles.com/files/1174552/53423503141.pdfIn PDF document text
    • https://site-1176615.mozfiles.com/files/1176615/rezurufafafutukim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_5fabf5dc90587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463300/normal_5fbb510952268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_5fa86eb5ee5bf.pdfIn PDF document text
    • https://site-1176681.mozfiles.com/files/1176681/jirorewujepulinuvoto.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WZX5FgS/nbc_ct_live_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/DDruiax/slither._io_immortal_snake_hack_download.pdfIn PDF document text
    • https://sadoxeliwuduw.weebly.com/uploads/1/3/4/0/134040540/5994927.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/bufexa/wokiborosenaduso.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/balance_druid_gear_guide_bfa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 5264 bytes
SHA-256: c39d26a8931ce6434f74e1305295408af1ba25fedb6e75158ce8ffbaf55db032
font_01_sfnt_off0000fb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB09 4224 bytes
SHA-256: 0ddd9902372afb69a0d3126f24c319f8455b83f879ee3a783e2a00555725e165
font_02_sfnt_off0001064a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 13204 bytes
SHA-256: baadb73f03f5bdd7817a4da802360db8e23a0acbd5ccf4f06b2063555437d7b6
font_03_sfnt_off00012e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E99 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67