Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec5da6840139590…

MALICIOUS

PDF

64.4 KB Created: 2020-12-06 11:29:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 42d7514ae2db598028457fe053b7ef05 SHA-1: 07bd1a98dbc0ac5dcdab23d1ad36953de9c5c93c SHA-256: aec5da684013959028fe4b9cefdb99fa14c1fd45c99791e709f75fed636175d7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, with one prominent URL being `https://trafficel.ru/strik?utm_term=martin+d-45+brazilian`. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests the PDF itself is designed to redirect users to malicious sites.

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://trafficel.ru/strik?utm_term=martin+d-45+brazilian PDF link annotation
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/rofezutonufimutoge.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/ferekerunonow.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/5445663.pdfIn PDF document text
    • https://nisutezobeta.weebly.com/uploads/1/3/4/4/134486685/gimovujova.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wozumadaku-mukevewurovebu-nefebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380088/normal_5fc55882876b2.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/gitipelut/anatomy_trains_overview.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/aiaa_journal_submission_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/xifonijibog.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/4058053281.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/spotify_music_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/adobe_audition_1._5_free_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/34712031769.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/21_guns_lyrics_video.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_off0000bfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBB 5080 bytes
SHA-256: 7c7842ed71920edea071f014337bb68a84f536519c27f12959b6ff55e82398ec
font_01_sfnt_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 10456 bytes
SHA-256: 2967d532dd6c51c20890951091ed09121e687465be9e2cb189b95509f55f9b39

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