Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecdca2da94b429b…

MALICIOUS

PDF

85.0 KB Created: 2021-02-27 07:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5f67393ef7bc322765f42e7153553ab9 SHA-1: 60afa653b359c7293918d0fde2940869e9c9d2bb SHA-256: 9ecdca2da94b429b609345b79a09c92ad16cfb8dad7531bf863a0a1bcc65d55b
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 0.9997

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://dugedepap.ru/strik?utm_term=badger+100+garbage+disposal+reset PDF link annotation
    • http://zufejexilovexik.22web.org/sony_mdr-zx770bn_iphone_app.pdfIn PDF document text
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/lawojegaja.pdfIn PDF document text
    • http://goranefadosire.iblogger.org/what_is_dbms_in_computer_science.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/vihIjdJ/yeezy_700_v2_tephra.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/how_old_are_the_riveras.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/Iehjpgd/96485688560.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/gf9G0jd/106174351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/towutoginadivu/codycross_seasons_group_75_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/tafoseraxekegavufixim.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/ruvujekawowiz.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/92383469674.pdfIn PDF document text
    • http://zodumuf.rf.gd/cat_meow_sound_clip.pdfIn PDF document text
    • http://nupituf.epizy.com/pemazakogilokorojo.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/92056325434.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 5192 bytes
SHA-256: e69a8db6e9dc8faa62142e98192fd4f0aeb487116333609d93ca96fa3266ef6a
font_01_sfnt_off000114fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FD 10496 bytes
SHA-256: 2119bfbe14fc9bfd2d30bf9ae53e34068e4c253d3c89413685903e1eab0055a5
font_02_sfnt_off000138df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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