Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cffde86d0651349…

MALICIOUS

PDF

79.3 KB Created: 2021-04-22 22:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4d03d414e42190825c6e4c7fbaeb9e98 SHA-1: 7ff84b02f971d1c5a5410411b59da7721794c4b8 SHA-256: 1cffde86d0651349a36ac65601b536a40625dbe21fedd2d04bf8ba42a908e99c
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an embedded URL pointing to a suspicious domain, jottigo.ru, which is likely part of a phishing or malware distribution scheme. The document body appears to be heavily obfuscated or corrupted, but the presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=rifts+rpg+art PDF link annotation
    • https://cdn.sqhk.co/vutenugade/gViiiER/banikubonisovetapek.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/zSuVje6/fresh_fruit_cover_photography.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/JUWhege/super_mario_world_game_boy_advance_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/Jibgtgd/slendrina_must_die_the_school_full_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/h7Eicje/action_heroine_cheer_fruits_ann.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/ehiixsy/safipesenupasu.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajura/nGhFbM4/deginilelozukazesujibapat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jixojeripe.rf.gd/what_does_it_mean_to_use_the_strategy_of_the_lotus_sutra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c3eba9-71ef-4690-8719-92ef78506543/how_to_remove_drip_pan_from_ge_refrigerator.pdfIn PDF document text
    • http://rijimilaje.rf.gd/75620621820.pdfIn PDF document text
    • http://galinuv.rf.gd/anova_test_example.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/40100147125.pdfIn PDF document text
    • http://vukilef.rf.gd/botaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/59949209546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9bade1-d345-444b-aedf-ba93af3e4e8c/70339526084.pdfIn PDF document text
    • http://karifopiti.epizy.com/68241989249.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/70421860156.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/aroma_20_cup_digital_rice_cooker_manual.pdfIn PDF document text
    • http://kuxedas.rf.gd/jimipunilanotetugowurara.pdfIn PDF document text
    • http://mowowaruxuxizim.rf.gd/2014_ford_escape_se_ecoboost_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/19549843682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6cb2f9-eec9-4c35-992b-8c5519df261b/how_to_preheat_hamilton_beach_air_fryer.pdfIn PDF document text
    • http://xuguriganuzako.epizy.com/rabajebar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55f204d-9b36-4ee4-b48d-153d35ba1206/how_much_does_a_riding_lawn_mower_weigh.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_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 5044 bytes
SHA-256: 5eab04230666ec7b6ca0b07142d2f96277f9dd108859c498139889adc76d20dd
font_01_sfnt_off000108b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 11724 bytes
SHA-256: 6d4bfd8b4c83b01615ca79590625be1eefbf82b7d1fe3f7fd68d8eb611dfedb6

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