Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce096c96dd033777…

MALICIOUS

PDF

78.2 KB Created: 2021-02-14 03:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 05a7b5f5146c94d570dd00a42377e381 SHA-1: 9bdd39d64ba9f98a9ead0efb6d2201f6fde630cf SHA-256: ce096c96dd0337777db5e32a74e4dbb0a90cd708e375bb8dd8ea380c4862ce4b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs disguised as links to free movie content, which is a common lure for phishing or malware distribution. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, further supporting a malicious intent. ClamAV detection as Pdf.Phishing.Trojan confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/wix?keyword=watch+after+the+wedding+2019+online+free PDF link annotation
    • https://cdn.sqhk.co/wizevomorofe/hajjjb7/ice_cream_maker_cake_recipes_vanilla.pdfIn PDF document text
    • http://familyit.info/vinifenafuxinogafosiwi8ztsh.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/ja8xaXK/cut_the_rope_3_free_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/Rljbigr/lotexasikalujedeneki.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/2gi2sja/82930375306.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/topipovikapari/kunelenukadudadovuvig.pdfIn PDF document text
    • http://ritofeli.epizy.com/40021032061.pdfIn PDF document text
    • http://xewenometan.epizy.com/76709154769.pdfIn PDF document text
    • http://sokiguxesixup.epizy.com/adobe_reader_pc_windows_7.pdfIn PDF document text
    • http://musarozopod.rf.gd/sky_movies_tv_guide_uk.pdfIn PDF document text
    • http://rupiroliwon.epizy.com/3221702941.pdfIn PDF document text
    • http://mujevevurisul.epizy.com/88279657370.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_off0000f4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A1 5692 bytes
SHA-256: ec128c99031d031edd0d342ba0a824166629101863c1314de8d7837da812c887
font_01_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 10420 bytes
SHA-256: a44e3b21191063485276b28990a7cbfa035a947899aeac1966020f528408e7d8

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