Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7f72e0fbe589e1…

MALICIOUS

PDF

69.9 KB Created: 2021-01-20 08:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f250217b544707b42cad9fd6bfed2a8f SHA-1: c792a685a9f9a5da2c60441c386b5c85be42daf8 SHA-256: db7f72e0fbe589e1dfcd360801dfeca34cc349982ac709b10710447342107ba8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=after+dead+charlaine+harris+pdf PDF link annotation
    • https://site-1253176.mozfiles.com/files/1253176/purpose_driven_life_study_guide_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/ijjgeha/rock_outdoors_marine.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/nevovugatil.pdfIn PDF document text
    • https://site-1173903.mozfiles.com/files/1173903/blood_strike_android.pdfIn PDF document text
    • https://nusuxoxoli.weebly.com/uploads/1/3/2/7/132710665/8978691.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/gdiahcY/61634803277.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/hg8prXF/6329162564.pdfIn PDF document text
    • https://site-1205711.mozfiles.com/files/1205711/firefox_offline_kuyhaa.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuputid/4jg8WqB/2229261141.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/QKqhbib/49119289145.pdfIn PDF document text
    • https://site-1166603.mozfiles.com/files/1166603/tadonon.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/9240877.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/tabagelufazafew/phim_hong_kong_long_tieng_1989_huynh_nhat_hoa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/anbae_per_anbae_video_song_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/vegas_pro_14._0_64-_bit.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_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 5232 bytes
SHA-256: 65df23e47193ff531599e43c201d92623b55c07d0f466b3fa038f5fb316cc84e
font_01_sfnt_off0000e682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 10640 bytes
SHA-256: f71ab9c2b2875a134487de3a403c33f9586137f266f092c77cded8f1ace073c3