Malicious PDF — malware analysis report

Static analysis result for SHA-256 feeab866defe16a3…

MALICIOUS

PDF

83.7 KB Created: 2021-03-03 08:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c4e9c84bbb0b377232f416dd9f8b1ecf SHA-1: 0707235ff2967db80e867af091b95a76ccadda08 SHA-256: feeab866defe16a384646a998f9a431aa5ac9e994954185cbd124d8535ffa990
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a link farm with numerous URLs pointing to disposable hosting services, designed to redirect users to potentially harmful content. The embedded URL and the document body suggest a phishing or scam attempt by disguising malicious links as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wb?keyword=how%20do%20you%20reset%20a%20zebronics%20bluetooth%20speaker PDF link annotation
    • https://cdn.sqhk.co/jabupexipa/vigiOjg/48751622844.pdfIn PDF document text
    • https://cdn.sqhk.co/vinusubat/Cshc1El/1890686667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495839/normal_5ffa291ecb63b.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/R3YcuTP/zakijajalazivejilo.pdfIn PDF document text
    • http://bestita.space/renetedabl18c8.pdfIn PDF document text
    • http://liketsven.xyz/adithya_varma_songs3uhhp.pdfIn PDF document text
    • http://thrivewebs.com/chennai_bangalore_shatabdi_departure_platformz14x9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495265/normal_6017277d7d9c7.pdfIn PDF document text
    • https://kademagora.weebly.com/uploads/1/3/4/8/134850034/2452457.pdfIn PDF document text
    • https://toxupuxuforiri.weebly.com/uploads/1/3/5/9/135966975/9343815.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/ew0T0ja/59523886043.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/cviaGbU/84288390234.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/xha42Vm/29191142936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446930/normal_60197bec28321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_6025b29358cff.pdfIn PDF document text
    • https://nobazivikiva.weebly.com/uploads/1/3/0/7/130776215/0ac4658f.pdfIn PDF document text
    • http://pet-guru.shop/pelimijbzyrw.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/nusadunesa_bisoke_minasonev_risinawi.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_off00010909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 5568 bytes
SHA-256: 6184b9b4b03239bbe2eac168b62ba137c10e017ab28557a1bb39451e5163f503
font_01_sfnt_off00011c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C08 11036 bytes
SHA-256: 2e1e8a13dbd04b39d32a7886e82238ef415f0406ebfafdfa2d0bacaed3b347d6

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