Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e9c0439b19d148…

MALICIOUS

PDF

87.1 KB Created: 2021-01-11 22:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4402f08c75f92e714442b2f24808e19 SHA-1: 9c0ead875fdf189c55635d441d9f69e3077e27d3 SHA-256: f7e9c0439b19d148d7008ee12fd58ff5de8b352a9e2f788d016402cec2d7e0ac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple external URIs, including one that appears to be a lure for watching a movie. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=watch+detective+pikachu+full+movie+in+hindi+online PDF link annotation
    • https://kunisalopug.weebly.com/uploads/1/3/4/3/134315348/mebisokanekal_vogowiwebi_nojuzi.pdfIn PDF document text
    • https://site-1174077.mozfiles.com/files/1174077/ice_cream_frozen_bananas.pdfIn PDF document text
    • https://fodolirikixubug.weebly.com/uploads/1/3/5/2/135297927/a6a14a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423715/normal_5f9f9f12e906d.pdfIn PDF document text
    • https://site-1177606.mozfiles.com/files/1177606/minerals_in_food.pdfIn PDF document text
    • https://site-1083673.mozfiles.com/files/1083673/57744280527.pdfIn PDF document text
    • https://site-1168247.mozfiles.com/files/1168247/magalogenumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392453/normal_5ff455962b24f.pdfIn PDF document text
    • https://site-1172329.mozfiles.com/files/1172329/nolopabozizep.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/wajibile/real_cake_maker_3d_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/pidedagiwufomi.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/bluetooth_mouse_for_android_cdr_king.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/20309259388.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/6449332732.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/anniyan_movie_hd_video_songs_free.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_off00011948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 5260 bytes
SHA-256: 890c4ee052f0524f1a9cea9e8756b93ee67cffdd2ca7372e910173073a4a1fff
font_01_sfnt_off00012b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B19 10476 bytes
SHA-256: bd845b89d44f886783d6b857ced09fe16feaa0eed676be90005afb3fb9fb6391

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