Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eee4e3816850290…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 05:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4fc09fee7399eb62f90daf786c8d6262 SHA-1: b91f52bb87415ff7e88d507ad124b1ec394c7cd6 SHA-256: 3eee4e3816850290d4b5b777b243ec878646679475c173de0418881acb713a39
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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/strik?utm_term=buy+maverick+et+733+bedienungsanleitung+deutsch PDF link annotation
    • http://atelier-spb.com/a_pair_of_silk_stockings_symbolismd6ia6.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/eNdhhjh/pekegitulugemo.pdfIn PDF document text
    • http://xivoxuvawet.iblogger.org/cervical_radiculopathy_treatment.pdfIn PDF document text
    • http://xefagebelajeli.iblogger.org/xaguduji.pdfIn PDF document text
    • http://todayit.pro/tivevariximfont4.pdfIn PDF document text
    • http://ionatr.fun/nelinuwavoxinaejer.pdfIn PDF document text
    • http://healthytrands.com/33933095653pmsqo.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/a4ehbja/zarurunelul.pdfIn PDF document text
    • http://semengergel.ru/instep_bicycle_trailer_hitchk93x5.pdfIn PDF document text
    • http://drovazvenigorod.ru/define_attested_formk1jnn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupifikitove.epizy.com/non_governmental_organizations_in_tanzania.pdfIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_1dfa1c7b33a04cbab0c3ee39ae06e545.pdf?index=trueIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_3c0009f1372e4473b8afb4c80b968671.pdf?index=trueIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_f2c75f05981d4ccf949bcfa4b3f4eb6c.pdf?index=trueIn PDF document text
    • http://suvowafavij.epizy.com/poxilususufika.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_97ac003ce88b4d88b4d275f02db86f0c.pdf?index=trueIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_c9fc479e97cb44acb483a9d6756089ed.pdf?index=trueIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_faca1a0615c6499ea5da4e090c2f2c41.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_02401d33e461423989f1ee33b8443416.pdf?index=trueIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_99c737902f2846a7a49b275fb028b0bd.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 6012 bytes
SHA-256: b50df5633c17be1c6fbf2f09a1e6e9737c08c14b04516bf6f4e29c1ecc2c0d80
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 11436 bytes
SHA-256: 05e082ea85474c032dd6d55c491bd6ccc57b7562535c9130a8a3d6f9bb7d42a1

Open this report in the interactive analyzer, or submit your own file for analysis.