Malicious PDF — malware analysis report

Static analysis result for SHA-256 da122cbd9bd73f59…

MALICIOUS

PDF

74.4 KB Created: 2021-02-21 11:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d8363111c73559ee4d9a672304f1e2e3 SHA-1: 3e1aa63ba7026132b8f79f6c0776c29c4776bb9a SHA-256: da122cbd9bd73f5972b0e31ae7cea52f117001b5c12bb92a017698c4a6f7ebd0
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm heuristic, suggests the document is designed to redirect users to potentially harmful websites. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution scheme.

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://baarspo.ru/wix?keyword=mario+bro+flash+3 PDF link annotation
    • https://cdn.sqhk.co/susojareb/hjjfibF/nashville_smart_start.pdfIn PDF document text
    • https://wavasifowimuzog.weebly.com/uploads/1/3/5/3/135321241/winukegajuvavufifip.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/4HyjhXG/fezuwomirekobijexarasivo.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/ahiLjaJ/popular_tick_tock_songs_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/devurekon/Gjbheie/xiwelu.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/hhiajen/dekajan.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/MkaXrjg/nilelasis.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/jhgjcgd/tometem.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/jizobana.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jfg9Pgh/extreme_off_road_trail_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/qjdpRS4/airbnb_customer_service_advisor_work_from_home.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/HVIViiH/puzolepanubadijuwivojizid.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/jinabom/19763313349.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/what_is_organizational_culture_in_law_enforcement.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/angular_directive_multiple_templateurl.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/46535599987.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/fumilewaduxi.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/wapodavowaxivesazixi.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_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 5164 bytes
SHA-256: 09f208145e0f358febd8b312bc905156ef1fb30267df03780aadef0be834c765
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 10740 bytes
SHA-256: 9457aa4f1ea5992efb64833e4a948139d07cfc1d60ae9d1cbc3818d4c4e855a5

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