Malicious PDF — malware analysis report

Static analysis result for SHA-256 afca447e69ce58bb…

MALICIOUS

PDF

84.9 KB Created: 2021-04-01 10:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7863996ec3990a795d651ab4da0907ed SHA-1: cf8f316d0dd70ab502c1521a9d3c06536c627aae SHA-256: afca447e69ce58bb6f020f7c07d18d857e4e03bcd263fcac157ef2d2625efaed
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of numerous links on disposable hosting, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=criminal+justice+behind+closed+doors+story+explained PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386822/normal_60497fbfd7fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_604bc8f2baf35.pdfIn PDF document text
    • https://bupizezar.weebly.com/uploads/1/3/4/8/134853483/tiniwevivejezir_pozezamuzawun_dedekakoz_jerujakam.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/eiihaig/hades_star_wiki.pdfIn PDF document text
    • https://penomagara.weebly.com/uploads/1/3/2/6/132695387/9367225.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/dehbjiY/zakosatetudorosuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481418/normal_60072ca7c80e0.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/zaboxomitomifabefejapum.pdfIn PDF document text
    • https://foserexekoxa.weebly.com/uploads/1/3/0/7/130740627/d445e9f5acb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490519/normal_60097d5b76824.pdfIn PDF document text
    • http://kutegexuwudaro.getenjoyment.net/72245569190.pdfIn PDF document text
    • http://sovolox.getenjoyment.net/technical_support_associate_interview_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/fxtfaic/pokolebokor.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/campbell_biology_chapter_1_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473902/normal_5fe31b1682fa0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujidise.epizy.com/dahao_embroidery_software.pdfIn PDF document text
    • http://sirovorisolilu.rf.gd/netflix_movies_file_size.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/67271227289.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/how_to_be_fast_in_mental_calculations.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/61115150255.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/assassin_s_creed_syndicate_weapons_guide.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_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 5604 bytes
SHA-256: 15c432f39982cc7c64f78350007c505a3f01ff3edc938c95e99090b1bd3d7b0b
font_01_sfnt_off00012082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12082 11068 bytes
SHA-256: b2f89b8102255fabeb3c7e7fb9e69b754aa569d7914d0a586a221158af82507b

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