Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc769edd1dd54999…

MALICIOUS

PDF

61.6 KB Created: 2021-02-20 23:26:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f68db6cef82ce7c5c7fcda464cdca361 SHA-1: d77ccfe98c43f9338e1da5c74f2158d6cb45fbae SHA-256: dc769edd1dd5499947972007d268ea26babfb2930639b15224420473af343334
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or redirection strategy. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://leonvi.ru/strik?utm_term=why+would+a+diesel+blow+white+smoke PDF link annotation
    • http://lidlid.xyz/o2_answerphone_offsf62y.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/vanopefe_tanexemuzek_dajelir_jalupuzesuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_6013c0df5f6a6.pdfIn PDF document text
    • http://astropsychology.site/rta_audio_analyzer3y3yd.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/rirusinurekozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasutin.epizy.com/brucella_canis_reportable_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/debian_buster_alpha_5.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/charlie_chaplin_the_great_dictator_movie.pdfIn PDF document text
    • http://palomidifigur.epizy.com/fosotegekab.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/95521055580.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/77513248102.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/31663996895.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/easter_exsultet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/spotify_premium_pc_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/kiserudojogetozawaz.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_off0000e21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21B 5380 bytes
SHA-256: b36a3f41fa9b2989b8839e22e8e177ae492a535ad31ef95735c6043a44804560

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