Malicious PDF — malware analysis report

Static analysis result for SHA-256 969f3b368e3e0d3a…

MALICIOUS

PDF

77.1 KB Created: 2021-02-16 23:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 636d2bb83507d53be18a46b2fe20bcbb SHA-1: 31ae1ed165c74fb5b13a090d476877c042744825 SHA-256: 969f3b368e3e0d3a06ce066fb78d5da2e53f332e201d3a3cae75f70617a00407
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 0.9996

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://jacksth.ru/strik?utm_term=what+is+grounded+theory+methodology+in+qualitative+research PDF link annotation
    • http://monoga.space/89929088134coryc.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/egeUgip/vr_360_horror_movies.pdfIn PDF document text
    • http://mishabelle.ru/777929588712z9ao.pdfIn PDF document text
    • https://puluzoxaxidu.weebly.com/uploads/1/3/2/6/132683087/woxaloji.pdfIn PDF document text
    • http://chebsvet.ru/epidemiologia_clnica_elementos_essenciais4zcwa.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/gcijgiK/microsoft_teams_apple_watch.pdfIn PDF document text
    • http://jibinomazovujug.22web.org/30831818039.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/TSWgfid/modern_heavy_duty_tractor_farming_simulator_3ds_review.pdfIn PDF document text
    • http://verifybadgesbusiness.com/ferawinesesetemumukov98qd7.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/fgigggd/nagavobofilawinumisej.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/hhkgcjj/jadoreneba.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/kIicheZ/hangout_app_for_pc.pdfIn PDF document text
    • http://yatvoyya.fun/leki_replacement_partsets6g.pdfIn PDF document text
    • https://wilibuluso.weebly.com/uploads/1/3/6/0/136086636/6542381.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/4SwJuKf/vepodojajajemo.pdfIn PDF document text
    • http://ogranicbio.space/kugibifidajaleowofb.pdfIn PDF document text
    • http://sqrab.top/stack_cubes_gamea3unf.pdfIn PDF document text
    • https://tilinonulubun.weebly.com/uploads/1/3/4/6/134614078/3709791.pdfIn PDF document text
    • http://true-board1.club/battery_charging_appsca50w.pdfIn PDF document text
    • http://lidzadva.xyz/94410399429f9yni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafazexetoraxik.epizy.com/bahubali_tamil_movie_tamilrockers_single_part.pdfIn PDF document text
    • http://jeruzofifisamen.rf.gd/entertainment_one_annual_report.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_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 5656 bytes
SHA-256: bb37ff1eb9b8d2d5d25a42231c7633d625a274cdad14d5d504040a643b2c4115
font_01_sfnt_off000100ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 11180 bytes
SHA-256: 2095dfd1414153812e936eadf880995a6317b916efa89b4ed2e945d467577d5d

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