Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f0cd5cefb7cf85…

MALICIOUS

PDF

74.1 KB Created: 2021-04-06 13:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ad71acd9034547ef7d793df107a6f6 SHA-1: edf0a8ff8b9b0828e5f0c91998683937610fbf37 SHA-256: 32f0cd5cefb7cf858b3acc30374c30b2e7f125634c158fb4d35471c87de3c898
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious or deceptive content, possibly for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=casio+protrek+titanium+bracelet
    • https://cdn.sqhk.co/pasivuzuke/hjPgehe/winterhawks_roster_2017.pdf
    • http://fewudutizoxom.medianewsonline.com/gasoremukizar.pdf
    • https://cdn.sqhk.co/pigexebobe/FyiiP2l/87666885325.pdf
    • https://cdn.sqhk.co/divojimo/hjfjdjc/solitaire_treasure_of_time_free_download.pdf
    • https://cdn.sqhk.co/madumubo/LuhfTie/samsung_voice_recorder_ipad.pdf
    • https://cdn.sqhk.co/budotedo/sMeBmia/43442327896.pdf
    • http://wewofif.scienceontheweb.net/wiwujasexabuxilekoxedaba.pdf
    • https://cdn.sqhk.co/kerutadit/idrjbid/street_of_rage_game_jar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/bbbdb669-1415-43a4-9261-9f1d4ee81dcc/how_do_you_pray_for_world_peace.pdf
    • https://uploads.strikinglycdn.com/files/bf2a953b-b6fb-4b05-8426-9530796135ba/31905946610.pdf
    • https://uploads.strikinglycdn.com/files/e3f0f5ee-2de2-427f-985f-0a218581c2e1/beretta_m93r_robocop_auto-9.pdf
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_9166c51b38ba4aab883a701b8b31cec7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bf54bf02-961b-40e6-8759-3dc0400338ea/73467191783.pdf
    • https://uploads.strikinglycdn.com/files/47685781-2146-4e2c-8099-1e3f28aae955/fonazasimogoroxeja.pdf
    • https://uploads.strikinglycdn.com/files/e91e45cf-f22a-4690-a5ab-ec4384ddd5d2/59686967377.pdf
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_1b233d42edab404384b63bd64180a735.pdf?index=true
    • https://uploads.strikinglycdn.com/files/32fb9462-feee-489f-a3ad-56a0aa6691a8/medio_de_comunicacion_mas_antiguo_del_mundo.pdf
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_5b7fbdf4e2e44f93ab19e48883def686.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d51e.bin
3337b9d0510613db3eef2756a31901cc9805324d083777124be02ad0c180b4ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD51E 5188 bytes
font_01_sfnt_off0000e6b2.bin
b1829a8da2dc4ae3a17ad8546b7c9d60eaf2ec01306586df4c44108a0b37b549		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B2 11456 bytes
font_02_sfnt_off00010d14.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 4324 bytes

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