Malicious PDF — malware analysis report

Static analysis result for SHA-256 d347a90bc24ffd18…

MALICIOUS

PDF

68.9 KB Created: 2021-03-28 18:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01e40e322285791218adb3ff3ff59713 SHA-1: 9bc2b2e340307e975e44d2e9eddd489457455984 SHA-256: d347a90bc24ffd18e95627a7dcd6cb2c4923c198d2d6c38066641d8b2557136f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.8294

Heuristics 4

  • 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 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
  • 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://xajibur.ru/strik?utm_term=what+is+an+example+of+a+good+thesis+statement PDF link annotation
    • http://tiktokcopyrighthelpteam.com/free_articulate_storyline_themes2zwrw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_601a6f4334217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_5fd33a1c3f3fe.pdfIn PDF document text
    • http://aduo5.online/lapin_au_cidre_et_lardonso6djz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_601465f85a684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_604b333599e9b.pdfIn PDF document text
    • http://ejinaya.com/58078516597fcef5.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/gosesukodikimuxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fc59479b73a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460066/normal_60203b6dc7392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_604a4b42434ce.pdfIn PDF document text
    • http://apsmall.space/gofuluvixejoremixekop9fgf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365536/normal_6005161b3e321.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/zebarufuridorur/2303887073.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/high_school_vocabulary.pdfIn PDF document text
    • http://girofili.myartsonline.com/what_is_flock_mean.pdfIn PDF document text
    • http://dexizijisub.atwebpages.com/admirvel_mundo_novo_br.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/tutonibepivulejapuze.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/servers_training_indiana.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/astro_vision_lifesign_horoscope_kannada_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 5440 bytes
SHA-256: 27971fd53ca4b44bdf41f10de5a6df565c48adc6c4cbd525b7a7270ff324b48f