Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc46a24b7cb70e3…

MALICIOUS

PDF

108.2 KB Created: 2021-04-07 14:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 908b6eb6e13824e5b058affe1741d877 SHA-1: 773227a466a48787cde149c0d080b12f1984ca58 SHA-256: fdc46a24b7cb70e39aecc292cee3ce1883cde967ce01a6d39d011710cd05cd42
134 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that aligns with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=what+is+the+oa+food+plan PDF link annotation
    • https://cdn.sqhk.co/remigalakefo/iyahcjd/pezoratubosofi.pdfIn PDF document text
    • http://solavopuna.22web.org/makalah_jantung_koroner.pdfIn PDF document text
    • https://cdn.sqhk.co/lukupupiba/cFjieie/walmart_neighborhood_market_pharmacy_hours_searcy_ar.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/jfigjid/free_slot_car_racing_game.pdfIn PDF document text
    • http://prosale.company/119596157829d9x6.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/Qjdnkr6/bhumika_movie_song.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotefi/ijyjiL0/wonagijomagebibi.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/c6ji6FF/tauceti_vulkan_technology_benchmark_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/8gjjjFz/remewebijija.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/vghghXx/radijedazonavokorivilip.pdfIn PDF document text
    • http://milafikolume.iblogger.org/aviator_movie_in_tamil.pdfIn PDF document text
    • http://excellent-spb.ru/my_boy_gba_emulator_apk_pc0s8mi.pdfIn PDF document text
    • https://cdn.sqhk.co/mimizajig/jrX5him/best_free_kicks_in_world_cup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e53182-2c21-4c7b-9e17-58782f8650a5/ninjago_season_11_episode_16.pdfIn PDF document text
    • http://tudigefogoxawu.rf.gd/dyson_cinetic_big_ball_animal_2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7723e8-644c-4c4e-a8e8-46e06ed9997c/how_to_harvest_loose_leaf_lettuce_so_it_keeps_growing.pdfIn PDF document text
    • http://wimosatemegof.rf.gd/sportswear_international_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6268110-e002-45d8-ac64-2cf43f19ae19/dedozozufonokojaxiboge.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_off00016c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C62 5044 bytes
SHA-256: a7043f50f96616a15071d51a6afd2c56b232b6cba457480040fff730b2e1150a
font_01_sfnt_off00017d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D9C 11228 bytes
SHA-256: 7bb376ab7ada8c8d97ecbaebddedcd9a277bafd478d48a95c94538230270fd38

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