Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2b9108830403da…

MALICIOUS

PDF

74.8 KB Created: 2021-02-24 16:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29d919357ae0cef30290dd3c6b0acd90 SHA-1: c2602e0ad92c8954a67f45cdd1dffc806c4de799 SHA-256: 4b2b9108830403da4b659a3e7d68a02a821dfc6abf85504ebf39304e8b754bba
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic to drive traffic to potentially malicious sites. The embedded URL 'https://jottigo.ru/strik?utm_term=what+does+the+bible+said+about+christmas' is likely part of this redirection scheme.

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/strik?utm_term=what+does+the+bible+said+about+christmas PDF link annotation
    • https://pikisavejalanab.weebly.com/uploads/1/3/3/9/133986241/puporijewesagovavas.pdfIn PDF document text
    • https://sogakuguw.weebly.com/uploads/1/3/1/4/131453515/5911128.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/9941965.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/7897180.pdfIn PDF document text
    • https://tomewulasanuful.weebly.com/uploads/1/3/1/6/131637374/fujuvafiv.pdfIn PDF document text
    • https://jekugisolidib.weebly.com/uploads/1/3/4/0/134097103/6fddd914900d594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_602384573caed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5ff8113302697.pdfIn PDF document text
    • https://batapasupo.weebly.com/uploads/1/3/1/4/131482803/jokiwajixijadefo.pdfIn PDF document text
    • http://agentsecure.space/rozezitemef9a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_600f069d72fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459640/normal_60236f2d11076.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_60097fa6bdf9f.pdfIn PDF document text
    • https://ruvatekokero.weebly.com/uploads/1/3/1/4/131437102/vojepelepur.pdfIn PDF document text
    • http://myirn.icu/beditirikadozeves98sre.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416660/normal_6004a9c7a2cf2.pdfIn PDF document text
    • https://xododasewa.weebly.com/uploads/1/3/4/6/134600374/retujixubumerolafa.pdfIn PDF document text
    • http://fixmarker.fun/phenol_chloroform_isoamyl_alcohol_dna_extraction_phgakt9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_5fde766095a68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_60273b462002d.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_off0000e899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 5332 bytes
SHA-256: 0681229e6909fdc89e4875c7f8e196ed6d3b6275e1f4d30bbd10ef7f30759fca
font_01_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 10108 bytes
SHA-256: b70a7f5a8c875d9e435ea546b4ed15655a4cdeca62165ba495e9e5d972c49b58