Malicious PDF — malware analysis report

Static analysis result for SHA-256 1765f74519c38576…

MALICIOUS

PDF

71.2 KB Created: 2021-03-07 10:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b448e53d6f1292ff831e7de8227efc17 SHA-1: 0037a16841f0c04ec71de92a59120b853a174496 SHA-256: 1765f74519c3857609c00e87707d711e83ec9b4e918c37ef93572e172ae59415
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://xajibur.ru/wix?keyword=agptek+8gb+mp3+player+manual PDF link annotation
    • https://cdn.sqhk.co/xetilibul/KXgdhfL/fallout_shelter_free_no_download.pdfIn PDF document text
    • https://ganalazukomej.weebly.com/uploads/1/3/4/7/134714395/sijewonituke.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/Oib0uib/mabaroxit.pdfIn PDF document text
    • http://bupetud.xyz/mekukigikupemhy5xc.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/rulaj-moxat.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/titudafa-fewemoguzi.pdfIn PDF document text
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/3804785.pdfIn PDF document text
    • https://finugerijit.weebly.com/uploads/1/3/4/7/134702994/vajinakuba.pdfIn PDF document text
    • https://rezapikuxodet.weebly.com/uploads/1/3/0/9/130969426/9699848.pdfIn PDF document text
    • http://mazafaka69pussy.online/what_are_russian_princesses_calledmz8rs.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/6624933.pdfIn PDF document text
    • http://optalpha.com/nfl_standings_wild_card_20205px5q.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/iwiY0hi/mewe_gallery_company_limited_products.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/lorifawuvawot/40988642607.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/nuxebobawofunananitokiji.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/chat_application_in_c_windows_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/vuwonel.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/sufowofoliwewedipepet.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/38859471295.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/leukemia_journal_guidelines.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_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 5612 bytes
SHA-256: b03b834b667b5aba1c525e5860cd69787922922a0ffc09b52863be483c643cae
font_01_sfnt_off0000ebd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 10608 bytes
SHA-256: 8bef0c046f076f23210ab397fd19fca2ddf9cf1de44f1fec4ee49e6d6d92f135