Malicious PDF — malware analysis report

Static analysis result for SHA-256 10aa993b8f7f881a…

MALICIOUS

PDF

87.0 KB Created: 2021-01-15 05:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ea4c252e4a1af139a28c8d157380363a SHA-1: 3cef5926cb8c8aaa8850f302fa98ba66173074a3 SHA-256: 10aa993b8f7f881a5e2652b3e0d17b2d1491be78764587ca5c3885050028c80e
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing or SEO spam lure. It contains a large number of embedded links pointing to various external websites, including a known malicious redirector at 'https://cctraff.ru/aws?utm_term=yii2+activeform+id'. The presence of numerous links on disposable hosting suggests an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://cctraff.ru/aws?utm_term=yii2+activeform+id In PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/ditikubokaxotam-gidof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5fbdec1660da2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403672/normal_6000bfe31af28.pdfIn PDF document text
    • https://vidafipi.weebly.com/uploads/1/3/1/6/131636743/9de61fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5f8ed98e8d218.pdfIn PDF document text
    • https://wuwifure.weebly.com/uploads/1/3/4/6/134647121/7800958.pdfIn PDF document text
    • https://cdn.sqhk.co/juzureniwibu/0ib5Thh/cima_study_text_e3_strategic_management.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_5fb3e00964d3c.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/zimekipinomo-xajufesebufeket.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/eiihg1E/51231723800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_5fe6bad1d0e9a.pdfIn PDF document text
    • https://karesaxu.weebly.com/uploads/1/3/5/3/135392924/7834e5c82c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fd6e2c722662.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/luraxo_pifesejix_dugelusegi_vuwimezokawel.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/zamovumez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF7 20892 bytes
SHA-256: 1c4e29df80644d5dd7acab4bfce59543bc8c41321cb78514538544ae271d293b
font_01_sfnt_off00011720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11720 5112 bytes
SHA-256: db57034b9216b383376d350b0a6855e214d1481c29fa1eb8c3b428e6c7003869
font_02_sfnt_off00012879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12879 11112 bytes
SHA-256: cb30a84c871fac23f5ed6b75168e04dbd560d89ce52fb372d26163c27f778f5d

Open this report in the interactive analyzer, or submit your own file for analysis.