Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57dc402dfc9a4dd…

MALICIOUS

PDF

73.9 KB Created: 2021-02-17 00:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c18fe3f3f005cb2168b6a14aa7ecb62b SHA-1: cee3abbeea0c678e466816cac1cb1e2f46c6b335 SHA-256: a57dc402dfc9a4ddaab9f95326a8c78996d39a2a9ebbd9b8143f7954b9ebbcf4
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 likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting it functions as a link farm or a phishing lure. The embedded URLs, such as 'https://seumenha.ru/wix?keyword=i+ready+hacks', are likely used to redirect users to malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=i+ready+hacks PDF link annotation
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/1973445.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/gehhxdH/55953013078.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hfjuSjb/haunted_house_halloween_rundle_road_sheffield.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/bgiLOhd/nausea_electronic_audible_sound_prank_device.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/i4Fjjib/90274615242.pdfIn PDF document text
    • https://purabadixubemik.weebly.com/uploads/1/3/5/3/135399060/2319748.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/hjidjjd/fear_the_walking_dead_season_5_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/hbCQfgj/sawewiwijetuvixav.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/0TgdZkD/conocer_mi_saldo_telcel.pdfIn PDF document text
    • http://gulebamabixaku.22web.org/wobble_line_dance_song_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/ifbhiNN/ultimate_guitar_tabs_chords_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/Qjyib0q/rabixedakefawusivefexewum.pdfIn PDF document text
    • https://lezexoxutipeb.weebly.com/uploads/1/3/4/4/134462335/sukelisesema-bulobapoj-libonaru-moxofoteja.pdfIn PDF document text
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/2d7e0df3fcb08c.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/bkKZhdD/54796254217.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/EIha80A/pop_music_definition_in_urdu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavovexerok.epizy.com/adk_map.pdfIn PDF document text
    • http://xesovukefezusag.rf.gd/pegiwaxasitudaterafozig.pdfIn PDF document text
    • http://nufejubonuviwo.epizy.com/mawefiko.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_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 5100 bytes
SHA-256: 307673a8b6c823a0f73aff44c0b78e1fc22af473fb1fb06995f175c6f10ab56c
font_01_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 13880 bytes
SHA-256: dbdfe236882cc2684a7b3629a2c430cb845981efe15e8d83063335a649d387fc

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