Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac63b79e571ac12…

MALICIOUS

PDF

75.7 KB Created: 2020-12-31 14:52:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a7292a8ed942408a61ed7ceeafa5b9ee SHA-1: 19dc611bc2950af7f1f2a3424d9409cf0932acf2 SHA-256: 0ac63b79e571ac12c09cab674349e6ca4b94c79c712824b029095caabfa7413a
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://traffking.ru/strik?utm_term=plants+vs+zombies+3+apk+free+download PDF link annotation
    • https://wenewemegidipep.weebly.com/uploads/1/3/4/6/134679414/6794123.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/5370418.pdfIn PDF document text
    • https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/8889061fa0aa.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/lezerawe/benisibejivukipix.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/solicitation_letter_sample_for_alumni.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/enterobacter_aerogenes_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/album_songs_tamil_whatsapp_status_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc49360-6262-45de-9047-372141dfc3cf/67577952523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196b058f-c3c4-4114-a38f-81acf5b6beca/female_mind_control.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/wrong_turn_movie_300mb_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/25808892012.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_off0000e0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F4 5760 bytes
SHA-256: f528e069bd33a49d37a4af3b589f219d237fb61a743351f0976933214471fd31
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 17160 bytes
SHA-256: ea2eb722f76c820b110be2886e1c934298b7ada91085d5ca4bb376a4cd806f91