Malicious PDF — malware analysis report

Static analysis result for SHA-256 06614c1e56bd6adf…

MALICIOUS

PDF

72.9 KB Created: 2021-04-07 04:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f05861bfb86f7034322918b569b74c70 SHA-1: df6ef603da9834b6f8d011eb04dc8aaf4de83105 SHA-256: 06614c1e56bd6adfe91c34a322dffd66f87b5ee8e398f5784c707fc58cb8c856
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware downloads. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to potentially harmful content.

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 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/123?utm_term=police+blotter+report+definition
    • http://nekazupafo.mygamesonline.org/aws_certification_solution_architect_associate.pdf
    • https://cdn.sqhk.co/rixazezozo/hvigzMP/hero_xtreme_200s_review_team_bhp.pdf
    • https://cdn.sqhk.co/nozesinipi/Z5ThiNP/57264126441.pdf
    • http://kino-vezde.ru/ribenimejulupevofefo5j6ps.pdf
    • http://silewugebed.scienceontheweb.net/hague_convention_apostille.pdf
    • https://cdn.sqhk.co/sizozizaj/gjpgfhj/lego_super_heroes_thanos_robot.pdf
    • http://wivevemeb.scienceontheweb.net/seduboxafakunoru.pdf
    • https://cdn.sqhk.co/gebunemif/dHYP1iW/us_off_road_army_truck_mod_apk.pdf
    • http://mazejofeg.mygamesonline.org/automobile_engineering_by_kirpal_singh.pdf
    • http://ch-bewertung-2888.xyz/lightning_bingo_worlduw2nm.pdf
    • http://glossywp.online/wrist_drop_exercisesp5r54.pdf
    • http://jolixasij.sportsontheweb.net/what_is_the_spirit_of_laws_by_montesquieu.pdf
    • https://cdn.sqhk.co/rovifatira/bbicic3/vutikokiruwuk.pdf
    • https://cdn.sqhk.co/nuduniguwufo/yNhdIgf/spacex_starship_hop_test_date.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/luxaduzimase/37049891957.pdf
    • http://tuxabatadifu.onlinewebshop.net/aprender_a_leer_notas_musicales.pdf
    • http://tikomiwewo.atwebpages.com/gufex.pdf
    • https://s3.amazonaws.com/vuforewebub/http_bssc._bih._nic._in_admit_card.pdf
    • http://gegilifopom.myartsonline.com/24878448146.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b7.bin
80aab69d659b2c5e51db110675b3ca410f03f4c7ac1e0117fd4e1b5a6efbb2ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 4900 bytes
font_01_sfnt_off0000f16c.bin
1f93cd3fabe921a580b3cc90858e89d6d2784b01a23d7e646a3c0777345a2e58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 10868 bytes

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