Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ac209b0ec7817c…

MALICIOUS

PDF

101.3 KB Created: 2021-02-17 08:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: cd0a6a93005bd06c7d44c57995ee8f4e SHA-1: 43715962a8d493b1bcbaace78317b7b7402af711 SHA-256: 47ac209b0ec7817c1dbf88add00473a0f4ca08ba7b4e54b1b3886e66a74e7683
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with many pointing to unknown or potentially malicious domains, indicating a link farm or phishing lure. ClamAV and ML heuristics confirm its malicious nature, classifying it as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/strik?utm_term=integral+of+%2528cos+x%2529%255E4+dx PDF link annotation
    • http://reduslimitalia-official.site/mibaxosidibewosusesf82.pdfIn PDF document text
    • http://ourfanz.com/formato_de_un_manual_de_calidadm56a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459628/normal_5ffc9f3820c3b.pdfIn PDF document text
    • http://findattime.com/big_time_rush_boyfriend_musicqbry2.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/7d0e75e6a2e3.pdfIn PDF document text
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/xatawawetidokofis.pdfIn PDF document text
    • http://itagreen.fun/trumpet_solo_piecesuue8p.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/ac482a4b753.pdfIn PDF document text
    • https://xabizukilitexe.weebly.com/uploads/1/3/4/3/134335342/3302105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_60276c7f4299f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426085/normal_5ffb80d2b3aad.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/sowewazulejewi/handbook_of_sociology_of_religion.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/26832877337.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/13726106574.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/broadsheet_north_sydney_cafes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12737 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0001317b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317B 5484 bytes
SHA-256: b4d25af0c550a8fa7b352fdcb0f5799652ce4fb19f52e28b7cfa202b7ae8b923
font_02_sfnt_off00014464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14464 13460 bytes
SHA-256: a75a68ae5edfbd0a33dd8c9dc819519e6d1892ac9604d60bcc057168d9a9987e
font_03_sfnt_off00016fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB9 16336 bytes
SHA-256: e73913c332530e1475fe2167617484c184bbe58693b2aa145373f59dfb3183b6

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