Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db8aec00827c9e4…

MALICIOUS

PDF

99.5 KB Created: 2021-03-22 17:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0022ff1f564740c5f8b43f146533eeb SHA-1: 1f656444e8b591a2f8284498111d2d169df5d37a SHA-256: 6db8aec00827c9e44472e3752531d5a5884daa2214cd2efa13bcec9de5b0ca37
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated in a pattern indicative of a link farm or SEO manipulation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=aran+sweater+pattern+pdf
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/detefukazawog_ragafebilokabu.pdf
    • https://cdn.sqhk.co/dodirijobadi/hfig0PA/tubifarikedudijalupujo.pdf
    • https://cdn.sqhk.co/waxipefimafa/bjcEgc6/taruj.pdf
    • https://cdn.sqhk.co/sowanigog/MLiijjs/chicken_gun_game_download.pdf
    • https://cdn.sqhk.co/tenotitur/fhd1Vhb/color_road_app_store.pdf
    • https://cdn.sqhk.co/lakivasulis/ePNhbhg/38344878743.pdf
    • http://mevukavotidu.getenjoyment.net/40045910341.pdf
    • https://cdn.sqhk.co/wemavutulow/kjfgcA0/marvin_gaye_greatest_hits_zip_download.pdf
    • https://cdn.sqhk.co/lolumebitana/idTgghg/45999758306.pdf
    • https://cdn.sqhk.co/jasurisunav/gjpxPvs/vokukanafana.pdf
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/48c36ece.pdf
    • http://morikulifitoj.22web.org/binary_bot_script_free.pdf
    • https://cdn.sqhk.co/tuwagezo/ii5MRpj/lofowusabubifikij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/57455569-81d2-4e26-a5dc-459d5f68b462/how_do_i_clean_my_levoit_humidifier.pdf
    • http://levewube.epizy.com/when_to_capitalize_special_education_teacher.pdf
    • https://uploads.strikinglycdn.com/files/0572ae84-858d-4c28-9848-7614e186bb7b/how_to_get_hp_printer_to_print_in_black_only.pdf
    • http://tudugir.atwebpages.com/http_appear_in_gdsonline.pdf
    • https://uploads.strikinglycdn.com/files/9dcd5c1a-aee6-423c-be27-ce177adf2278/how_to_get_your_football_team_sponsored_by_nike.pdf
    • https://uploads.strikinglycdn.com/files/bbc9e418-58df-45ea-bed2-d855039d4458/attack_on_titan_anime_season_2.pdf
    • https://uploads.strikinglycdn.com/files/96262bdd-3ea4-47ab-bb97-6abecb1ce980/how_much_is_my_nikon_worth.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000149bf.bin
402dad4640da9fcca6a3333f5e9a5ead75c4ad5d3722b42c4e6dc0a6fdf6c2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149BF 5084 bytes
font_01_sfnt_off00015b2d.bin
7c22c47e692baff0c7286e28262bc3b596e6f24e385203bdeb466a2af171db8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2D 10848 bytes

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