Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec94e35a4d21279…

MALICIOUS

PDF

91.6 KB Created: 2021-04-03 19:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c20bbf8e480e226a0548a3f87bbd7733 SHA-1: 691471265307aaf8a3de2e3b1d1bc40a16f59886 SHA-256: fec94e35a4d2127933f4388092d06e717921cdddb76846056c93f956e29d9e4b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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://pelibifir.ru/strik?utm_term=what+language+did+scottish+speak PDF link annotation
    • https://cdn.sqhk.co/wisaputal/hjbjjgF/red_ball_1001.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/NjgA4bU/lebavatimula.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/cher0Tf/pokemon_masters_ex_mod_apk_2._0._5.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/XY0ieF1/fifa_world_cup_qualifiers_2018_asia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_6cc2053f6609430e93020a686ab8e00d.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_8277e9593d1d4d2985f3cac73b262357.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_ce074183fbe5476292571813688d4537.pdf?index=trueIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_071ed309ad8048cdaaeab940e98be3ec.pdf?index=trueIn PDF document text
    • http://junimuji.rf.gd/25514087781.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_252be017352841ebb3a81369be40a21b.pdf?index=trueIn PDF document text
    • https://2d66045e-c276-4037-81df-184b25840e97.filesusr.com/ugd/cdf3e3_e1924604dc9f4fabbfde64ff24715fe3.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_ff07379a92a8468fafbf34987a1202ee.pdf?index=trueIn PDF document text
    • http://katetagozu.epizy.com/actionable_gamification_download.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_62d8e2d59dea44389bd2f50556986b09.pdf?index=trueIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_bc506c1912804521b79dff76d79c3e5a.pdf?index=trueIn 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_off000122f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F0 5316 bytes
SHA-256: 00244ac1627b54fb4fa9c1adc837d58a3e8740ba7f0d03f257aba722b398a66e
font_01_sfnt_off00013515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13515 13904 bytes
SHA-256: 2ca845202dcb23f6359f15da3c9e8618d8f9f698ae840b958d5d8d8186e6e269

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