Malicious PDF — malware analysis report

Static analysis result for SHA-256 2152e4de8086f9e8…

MALICIOUS

PDF

109.7 KB Created: 2021-03-02 11:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 458403b182af9cadde66d66abf2730d8 SHA-1: 1067ee871f3ff397d7143aaec40d0fc9593c61f8 SHA-256: 2152e4de8086f9e837edc0e565e394ad46255f43e09cfc088e2211d08b2ce0ab
156 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 0.9998

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=the+magic+flute+queen+of+the+night+song PDF link annotation
    • http://lumacy.site/purumuwufojozaxepubedoxnflc7.pdfIn PDF document text
    • http://idem-peshkom.ru/5837147864159c3u.pdfIn PDF document text
    • http://vovality.club/859026104936fuot.pdfIn PDF document text
    • http://fallofelin.online/ghostface_horror_movie_killermhbw9.pdfIn PDF document text
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/naboxozupa.pdfIn PDF document text
    • https://joxefumisati.weebly.com/uploads/1/3/1/4/131406837/pumizowokis-fowax-labar-nekoxuwarat.pdfIn PDF document text
    • https://lerogufoporix.weebly.com/uploads/1/3/4/8/134885840/f9e37dafcb1.pdfIn PDF document text
    • https://lolifibek.weebly.com/uploads/1/3/4/6/134634661/tefex_nepuworizese_zudiru.pdfIn PDF document text
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/d1680038188b8.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/zaragol.pdfIn PDF document text
    • http://cpskras.website/38133746222pwqxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovugi/mivizivix.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/what_is_high_concept_in_film.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/muwatabogofoviwejezuves.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/zoluxofepisupego.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/jasabidupo.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/97877227375.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/obdlink_mx_bluetooth_obd-ii_automotive_scan_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/volvo_penta_sx-m_parts_list.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001567a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1567A 5272 bytes
SHA-256: 721cfe934245a7b9e9d4624e9785fade721fa09b1ebe4d4c9168964e72e61b96
font_01_sfnt_off0001684d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1684D 13172 bytes
SHA-256: bc6057510ee2c830146060e2a16351a0e7cc797f18db92eb5fe72496180ffbd6
font_02_sfnt_off000193c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193C4 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832

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