Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ae914f06608dc4…

MALICIOUS

PDF

98.4 KB Created: 2021-05-21 00:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09d0312d732c7584cc3fa5a9fb755ede SHA-1: 7f605112eba59d7f06173935d014f7132d9871cb SHA-256: f8ae914f06608dc411c7c8357dee71ab8220df9d91dbc71e69f3ac6b8db2dfe8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a malicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to the embedded URL's query, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=if+i+have+siriusxm+can+i+listen+on+my+phone
    • https://static.s123-cdn-static.com/uploads/4423772/normal_6000b8af4e294.pdf
    • https://cdn-cms.f-static.net/uploads/4453560/normal_602a52e0a3274.pdf
    • https://cdn-cms.f-static.net/uploads/4387056/normal_600dc61e9520d.pdf
    • https://static.s123-cdn-static.com/uploads/4382962/normal_60069da4933cc.pdf
    • https://cdn-cms.f-static.net/uploads/4413719/normal_604b8015325d9.pdf
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6066468dec1c4.pdf
    • https://cdn-cms.f-static.net/uploads/4446273/normal_6015abe4a6c30.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6a3aa5a2-f416-49f3-ab9b-f39ca480cbf0/93699851225.pdf
    • https://uploads.strikinglycdn.com/files/87837fa3-fa05-40fa-b8b1-4ef466e10759/sedorajatipizo.pdf
    • https://s3.amazonaws.com/xepululejiwof/avengers_infinity_war_song_pagalworld.pdf
    • https://uploads.strikinglycdn.com/files/af03ba85-1efb-44c9-8776-0ccf27cc0862/baby_bullet_costco.pdf
    • https://uploads.strikinglycdn.com/files/bf6f0b04-7c49-4f00-a850-5c6e8c4b6a34/gem_trails_of_washington.pdf
    • https://s3.amazonaws.com/pululusodogi/battlefield_v_deluxe_edition_pc.pdf
    • https://uploads.strikinglycdn.com/files/9cbe0c90-5cb0-4f66-92aa-eef1b2d295bc/describe_how_carbon_atoms_are_joined_together_in_charcoal_graphite_and_diamond.pdf
    • https://uploads.strikinglycdn.com/files/d3d055f4-707f-4f52-9079-ddd5de66008b/49076766316.pdf
    • https://s3.amazonaws.com/lijulijowivaze/jvvnl_admit_card.pdf
    • https://uploads.strikinglycdn.com/files/22426e98-f9db-434c-9b66-3bb0b1f7dca9/42639259389.pdf
    • https://s3.amazonaws.com/fikuvine/gekufexesugip.pdf
    • https://s3.amazonaws.com/ditiruz/153705839.pdf
    • https://uploads.strikinglycdn.com/files/c7a68331-0a47-4a60-8e31-98e06d52f152/how_long_leave_splat_hair_dye_in.pdf
    • https://uploads.strikinglycdn.com/files/7707cb86-7d1e-4c9e-9648-044d0081d420/pokokuvuluraz.pdf
    • https://uploads.strikinglycdn.com/files/8ec283f6-4bd3-4559-a364-ed2c3f6439c0/list_of_irregular_yo_verbs_in_spanish.pdf
    • https://uploads.strikinglycdn.com/files/cc086aba-a59e-4ef9-a8d6-78375541bc46/how_to_see_mt_fuji_from_kawaguchiko_station.pdf
    • https://uploads.strikinglycdn.com/files/af48c379-a5cb-4e22-afdd-51a3f850e469/dish_hopper_with_sling_setup.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_off0001430e.bin
529faafc6e7c1afdb2454f0c18b33b5fbe5dcbc398d4efcfef4e44f2ae4c3b54
pdf-font-stream PDF embedded font (sfnt) at offset 0x1430E 5424 bytes
font_01_sfnt_off00015571.bin
73bcedc5f5a4d02b62e0fa60802b5fa7c6d8657139d1c90316fb9c98337644fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x15571 11236 bytes