Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49ab94017d745f3…

MALICIOUS

PDF

86.7 KB Created: 2021-04-08 14:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ce304dc699b87000f76ab3493e508604 SHA-1: 1b830e9a3f96bf95181f40db17cbd4e970e981b7 SHA-256: e49ab94017d745f33e266bad6b21411ad719e0208ae624344b9f979821d2a761
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though obfuscated, contains a reference to the Aberfan disaster, likely used as a lure to entice users to click on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://mezovuduw.ru/strik?utm_term=were+there+any+survivors+of+the+aberfan+disaster PDF link annotation
    • https://cdn.sqhk.co/tibakekavero/hggFdhf/idle_success_no_ads.pdfIn PDF document text
    • http://normal-id.com/93188480716d9mlt.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/bgha6hf/rope_swing_jelly_escape_cool_math_games.pdfIn PDF document text
    • http://mavpa.fun/sejudepetufavofijakilagov97fz.pdfIn PDF document text
    • http://gatorama.site/be_smart_english_workshopzy89y.pdfIn PDF document text
    • http://jobware.pro/driver_touchpad_acer_windows_10c1gah.pdfIn PDF document text
    • http://design-kvartira.info/servitta_s50404leiiy.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/6ijVE8a/gunship_battle_helicopter_3d_game_download_uptodown.pdfIn PDF document text
    • http://3203epworthcres.com/69738702058opqxu.pdfIn PDF document text
    • http://alania365.ru/how_to_turn_on_a_jam_hang_up_speakervg2c6.pdfIn PDF document text
    • http://letgtma.bid/dirt_devil_pet_vacuum_walmartb0ifh.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/HhhUiax/naninejinixunajapepater.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://medicinfo.online/define_balance_sheet_and_its_importance2mv5i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/saxefi/mafuvedibaxotatikasafo.pdfIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_1c6778f172d74debaffeda0263873faa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/121d39f4-9c49-4f1b-b9c8-784882f1b380/how_to_apply_expectancy_theory_of_motivation.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/braun_silk_epil_9_skin_spa_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b3ff7e-f0a5-4229-adde-d756d71aec35/demuz.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/how_to_train_for_basketball.pdfIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_99a58f4d2e8440a5b7e11bbbba5e2e9a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/translate_arabic_to_english_file_online.pdfIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_61ff1ac980904bd084f3f471bddf2179.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vosimalume/29856293497.pdfIn PDF document text
    • https://c93e3e17-565c-496b-95a0-45fea83b015f.filesusr.com/ugd/cd9bb8_60bafe56d0a84cad817d86fd6ce9580f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d81f68-a456-4074-ae08-9343cb902cec/fisher_price_rainforest_swing_j8518_manual.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_3b2863cc8dd045e2bc4aabab3c44f83a.pdf?index=trueIn 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_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 5276 bytes
SHA-256: 90927da1b0f3f354094027c8e471bc23cabc0a2d17782a9546c3f49931936815
font_01_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 12712 bytes
SHA-256: fb80d3c12b678c458af2901b0a1fa9ed33b3ab5109ff529f3f8a1a32cc710235