Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f49c0f2e6d5d591…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 16:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c8939bd85cd926a111ac5d8ff3aeab0d SHA-1: db377df8bbcb6f346ca9306bcd2866052d425afc SHA-256: 0f49c0f2e6d5d5919336f4ec12fb81dad686f0841cbd927a50069f765ac7bd8a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a 'tv guide' keyword in one of the URLs and the overall structure indicate a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/wix?keyword=miami+beach+tv+guide PDF link annotation
    • https://cdn.sqhk.co/vogoxaginoje/bhaia4r/24220275375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5fd399d35831c.pdfIn PDF document text
    • https://fufilotaniwa.weebly.com/uploads/1/3/5/3/135321354/c8cd988baf70.pdfIn PDF document text
    • https://nagaleburanab.weebly.com/uploads/1/3/4/3/134379557/4114555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452173/normal_5feaed549a1c5.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/8cda4b8c8b7f6a.pdfIn PDF document text
    • http://robolab.one/tamuxet7im5.pdfIn PDF document text
    • https://riragipus.weebly.com/uploads/1/3/4/3/134358734/sukepekuvoz_zudagixi_resezemew.pdfIn PDF document text
    • http://shopeuro.pro/night_owl_home_security_camera_reviews2za12.pdfIn PDF document text
    • https://bijasekimuku.weebly.com/uploads/1/3/4/5/134593614/xizenelema.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/cMcfuhE/ms_project_gantt_chart_free_download.pdfIn PDF document text
    • http://nuveclovet.xyz/dagopipevabakubyzpmy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_603f477694736.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/4qihqtf/black_friday_2020_laptop_deals_walmart.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/defujo/xakapunagagapedexujikuj.pdfIn PDF document text
    • https://c2963e02-5f2a-49ff-bb4d-22715b80ab3a.filesusr.com/ugd/55efe4_046928f34434479fb7386e4b7081e456.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutasujal/nine_stars_touchless_trash_can_replacement_lid.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_8d84d2f75eec488bbc57983ec5eb0236.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/17907547509.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/90303605046.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_25467863714d4d628ca54df36835078d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posufij/bury_me_a_g_real_1.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_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 5252 bytes
SHA-256: 8034b67422b3c6793cee22fa9e537755898952481face245715a03c84f28fbbe
font_01_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 11176 bytes
SHA-256: aa27395b524916c61d0a0cbe2ed5061f4752250b19ff5193699f1e779baf6238