Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e231ccf91c0a96d…

MALICIOUS

PDF

78.3 KB Created: 2021-03-28 20:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 633f30e1ece5c8ce2b95cc23b82c4568 SHA-1: 299724c5bd6c8bf18b8b063af88d75dd9f63dc15 SHA-256: 3e231ccf91c0a96dddaa14c29a25d6461fb0f22f40c01a9fa64bf794e1481519
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as a phishing trojan. The document body, though heavily garbled, suggests a lure related to installing surveillance cameras. The presence of multiple external URIs and a link farm heuristic indicates a strong intent to redirect the user to potentially 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://xajibur.ru/award?keyword=comment+installer+des+cam%25C3%25A9ras+de+surveillance+pdf PDF link annotation
    • http://dvigatel.guru/ewi_4000_vs_5000p4rfs.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/Jhcy8jc/fiat_500_abarth_tuning_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/jjjcFjf/battleground_free_fire_survival_best_shooting_game_apk.pdfIn PDF document text
    • http://edaruzal.xyz/leredogimikuxm6co4.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/hfwGihQ/one_world_cup_2018_matches.pdfIn PDF document text
    • http://matulovipat.22web.org/room_on_the_broom_download_free.pdfIn PDF document text
    • http://faninugure.22web.org/74589861241.pdfIn PDF document text
    • http://ericksandoval.com/342963115062syv1.pdfIn PDF document text
    • http://nudistoff.club/82667563190ylyv9.pdfIn PDF document text
    • http://powerhdniy.space/60322276289zvny2.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/hijjjgf/cartoon_comic_strip_maker_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/jdXgche/pencil_case_objects_in_spanish.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_5f4afdae97cc45cea918e2c5081a7d71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f3c2ce-1bc3-4100-a0fb-2b010be2333a/beckers_world_of_the_cell_7th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0598e39-26fe-4e68-9cdd-dd4fab414b8c/22872758278.pdfIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_0629af69fab149649250f94b5de2f53f.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_cdf6ad2cc8a54d808304f107d9e48394.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_df6e0ef6d2114e74b5be201be9a17f23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd19120e-1b0c-4c1c-8b0c-ea3023219089/29293749536.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_0d1d2eeb9c0d493a8225800302a8b0a8.pdf?index=trueIn PDF document text
    • http://jujizulafob.rf.gd/73760520882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32a4d5b-81fd-4bd2-b89c-86c978c8e8e1/60370290474.pdfIn PDF document text
    • http://gitipezusev.rf.gd/92432085357.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_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 5408 bytes
SHA-256: a7db5c5ab8d60e9cd442a07a3c8bf1a2a8eec4916113d4eb62e7bf98091afcfb
font_01_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 12140 bytes
SHA-256: 4fac1720f38bedd7e8c92b2a459994aa6f8a046c8e5737586f78809e60238ca6

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