Malicious PDF — malware analysis report

Static analysis result for SHA-256 f474c319f5bf1dcb…

MALICIOUS

PDF

92.9 KB Created: 2021-03-05 05:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c738048e38fb6eb49e696561dfb0f6bf SHA-1: 5d2dae897aadd49152e5c015bfa7faea81f28b6b SHA-256: f474c319f5bf1dcbc5282c7e4e53882b92ee03b3b30a9e1c543e2e6d38f2cdc2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://pelibifir.ru/strik?utm_term=how+to+ignore+a+person+who doesn%2527t+like+you', is directly embedded and likely serves as the primary lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to ignoring someone, which is likely a pretext to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-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://pelibifir.ru/strik?utm_term=how+to+ignore+a+person+who+doesn%2527t+like+you
    • https://cdn.sqhk.co/gisatajofo/5LsN7uz/epic_card_game_dragon_deck.pdf
    • http://steelsho3.club/ceremonies_of_possession2x9bo.pdf
    • http://livecopyrightverification.com/refikafezapd9cz.pdf
    • https://cdn.sqhk.co/lupobikud/OjbLggH/destroy_all_humans_guide_trophy.pdf
    • https://neseroto.weebly.com/uploads/1/3/5/3/135326238/wazati-gekanapofinola-lagolimitot-gubowat.pdf
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/2a417.pdf
    • https://tebobasuzojipol.weebly.com/uploads/1/3/1/4/131407082/9039728.pdf
    • http://cesaregaspari.com/sql_interview_questions_for_experienced_manual_testersy7q8o.pdf
    • https://cdn.sqhk.co/vukupamita/jd7Opgg/at_t_u_verse_customer_service_number.pdf
    • http://gamedv.design/wamezufozewoxiretetokaor9lt.pdf
    • https://cdn.sqhk.co/xezexasag/gc5ggid/wsdot_cameras_spokane_valley.pdf
    • https://cdn.sqhk.co/rowubuvuke/gijinge/9771867919.pdf
    • http://balifruit.com/gudanixubovunaloviwx9ev3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4b2a9e20-d8f2-47aa-9067-32bd5294efa5/keurig_k10_cleaning_instructions.pdf
    • https://uploads.strikinglycdn.com/files/3466f1a9-5708-41f1-a4ee-eb752adee1df/78057705003.pdf
    • https://uploads.strikinglycdn.com/files/31a05405-f024-4cd8-8a7f-71b6ac21bb65/garmin_fenix_2_multisport_gps_watch.pdf
    • https://uploads.strikinglycdn.com/files/c4e65137-c856-46ad-a11f-09d2b7256a85/50699762223.pdf
    • https://uploads.strikinglycdn.com/files/40a31ae7-72dc-4857-9ece-ff66c674114f/weber_spirit_ii_e-310_gbs_gas_barbecue_review.pdf
    • https://uploads.strikinglycdn.com/files/c06c788d-e11c-4ea1-b09b-0c4c498cb099/reglas_de_acentuacion_de_las_palabras_esdrujulas_y_sobreesdrujulas.pdf
    • https://uploads.strikinglycdn.com/files/a6f6f9b6-22f6-4180-bde0-712d60801dd9/14180726167.pdf
    • https://uploads.strikinglycdn.com/files/41311869-11be-45db-ac65-7372b31dad73/90134436447.pdf
    • https://uploads.strikinglycdn.com/files/65ffee7c-c191-4b22-83c4-0d76aef0b2ce/4975068714.pdf
    • https://uploads.strikinglycdn.com/files/e9aa2711-6a36-4ca9-9e96-ccec3156c0b4/72678197678.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_off00012c78.bin
d34d6b9c39173fbd52f192eecea87156461fc381967a26f0702bd5d6aef6b1b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C78 5476 bytes
font_01_sfnt_off00013f2f.bin
0caeb9d4591e49364a8463e75a7ed472ff065ab62d6ac27e9cf0f04fd5b72d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2F 11256 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.