Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0f653aab9cd883…

MALICIOUS

PDF

70.5 KB Created: 2021-03-15 16:35:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 393975833a4396994df61cb5eaa4d60b SHA-1: aedca3ab62c36df9495adcbcd672e6cf72d25fdd SHA-256: 6d0f653aab9cd883fbdb8ce10fa4b7dcf5cd6d1a03c702cbd6626ef38f7d69fd
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and form a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/award?keyword=old+sda+hymnal+pdf PDF link annotation
    • https://cdn.sqhk.co/depivuni/hgIowhi/kuzenosujed.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/YiXzUpA/fantasy_premier_league_captain_choice_gameweek_18.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/ggjzqFu/31034721357.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/uzlja0W/wasedaji.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/w4haUHg/slice_dice_chop_or_julienne.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/hbO7YZy/timagupovimasex.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/how_do_you_program_a_universal_remote_to_a_linear_garage_door_opener.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/posogadolisu.pdfIn PDF document text
    • https://cdn.sqhk.co/begazopego/ajcagic/gold_miner_undersea_2_player_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dakiwadizadenig.rf.gd/latex_cookbook_recipe_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/is_graco_extend2fit_faa_approved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c01625-dc22-4df4-9ad6-ca048f427f6e/how_to_convert_jpg_image_into_icon.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/7338848416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b849cd-134f-4406-bab9-ba869a5ff261/whirlpool_duet_sport_ht_washer_troubleshooting.pdfIn PDF document text
    • http://tedonipevafipe.epizy.com/binocular_app_for_android.pdfIn PDF document text
    • http://rogofijanititad.epizy.com/rukobasowuvafivozalos.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/16685908245.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/75178856733.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC41 4744 bytes
SHA-256: 3390150e951b6b5bfe4b89f0f6c6d340a6397c14f7695cd9ee174e9561163734
font_01_sfnt_off0000dc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 10408 bytes
SHA-256: 4658904748bbcf24bbc8cc64c1d8c32ede2c20e2dc6069620c1b59b5562616bf
font_02_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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