Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9325b49960e30fa…

MALICIOUS

PDF

64.7 KB Created: 2021-02-22 10:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3c1fc3939a0fcc08ea48ca3e74829d47 SHA-1: 1236fcbeb5e8b7374622656a435b2c1e7f0bb907 SHA-256: b9325b49960e30fa5bc6a9c3cc8143aaac23b161eb874f45e8428fd484e90c8c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it's designed to redirect users to phishing or malware hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=sunsetter+flagpole+installation PDF link annotation
    • http://rilizikurejoru.22web.org/halloween_movie_tv_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/eT4Wt17/68204554413.pdfIn PDF document text
    • https://vituxusupodewe.weebly.com/uploads/1/3/1/3/131379836/ralixatepasepoz.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/jjfYkie/archipelago_botanicals_charcoal_rose_hand_wash.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/wk168jh/new_trending_video_download.pdfIn PDF document text
    • http://cuzinfo.ru/78841870302yz1wl.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/9460702.pdfIn PDF document text
    • http://eushopvmn.site/delamusoliei4fs.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/hgouggP/best_mobile_crypto_wallet_2020.pdfIn PDF document text
    • http://italy-small.space/zapifadibagewelelesuxatmylvt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedasajel.epizy.com/borrowing_base_report.pdfIn PDF document text
    • http://jopatodorijapu.epizy.com/70961385847.pdfIn PDF document text
    • http://sutuguve.rf.gd/mebituxum.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_off0000c14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14D 5172 bytes
SHA-256: f65bc01a88d377b77b30b6eba2ac0795cbc9c1e57e3f2a849287a0a2c52ef865
font_01_sfnt_off0000d2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F1 10268 bytes
SHA-256: 22f0f6d090042ad0f6825217812792fb6852fe0d6eb4a2cc3176e359666103b5

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