Malicious PDF — malware analysis report

Static analysis result for SHA-256 d018bd9766674b04…

MALICIOUS

PDF

86.5 KB Created: 2021-02-12 06:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 76eb5f9a9abe8367c9e91cf457bdf379 SHA-1: b343bc61f003157a17380998537d19133b37f848 SHA-256: d018bd9766674b04d01f0ade55cec7258c736166ab08368848be0a93f34f3f2b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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
  • 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://baarspo.ru/wix?keyword=smash+ultimate+challenges+list PDF link annotation
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/fapujibir.pdfIn PDF document text
    • https://cdn.sqhk.co/bimeniwog/gemHBmz/dupejedewe.pdfIn PDF document text
    • https://raponomipa.weebly.com/uploads/1/3/2/6/132681826/3882e64fc1df.pdfIn PDF document text
    • http://bazegal.iblogger.org/subulabifemolaxemazitapu.pdfIn PDF document text
    • https://kegebexik.weebly.com/uploads/1/3/4/5/134590944/1f86bc59.pdfIn PDF document text
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/lotivomeridisutewa.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/2028017.pdfIn PDF document text
    • https://nojezedefefowas.weebly.com/uploads/1/3/4/7/134762002/repotum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_601e6ed944793.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/6da4b04efedcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5ff6d1000fe23.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/bosebi_lefagi_forememijawu.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/RNRhbgi/modern_warfare_patch_notes_september_15.pdfIn PDF document text
    • http://pajodumu.22web.org/34226067455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://titesixa.rf.gd/lapland_finland_travel_guide.pdfIn PDF document text
    • http://luxepiluwi.epizy.com/free_product_comparison_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/97212304038.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/insert_multiple_sheets_in_excel_vba.pdfIn PDF document text
    • http://borarujedumamut.epizy.com/50459680348.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 3776 bytes
SHA-256: 4d1b3b44ec8c76ee5df1a3ed448270dacae99909fb63c922cc626b691130eaa8
font_01_sfnt_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 4992 bytes
SHA-256: 2de3e83c487ab62ab60bce81261b1e4126041142fcc925fa2ba4f0e34fbbd8c8
font_02_sfnt_off00011a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A19 10472 bytes
SHA-256: 2dc5020261aab1116fd448a3a087c1a39cd9ddd0a1ccb8107719fde51df9eb86
font_03_sfnt_off00013de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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