Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db2473dcdb801ac…

MALICIOUS

PDF

74.0 KB Created: 2021-03-06 19:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 659651363cb5047e9e2f47fa9b4f7b28 SHA-1: e4991019bc281cafb84d2fe7130aca10dedc2df5 SHA-256: 8db2473dcdb801ac018a6bde893c2497516659661e93695bf99196ae7e7a1e76
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a technical topic, which is a common lure for phishing attacks.

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://druttle.ru/123?utm_term=how+to+make+p+type+semiconductor PDF link annotation
    • http://qrastenmap.online/22383126606mottk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_6031f5adacbfb.pdfIn PDF document text
    • http://kataeta.club/oyster_auto_top_up_receiptpw3tg.pdfIn PDF document text
    • http://gtomishebs.xyz/5671163963697lfb.pdfIn PDF document text
    • http://indir-kazan.com/21235050394iw9p9.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/jaIiijd/new_york_pizza_company_palencia_menu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452381/normal_5fd35083329c2.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/twilight_saga_full_movie_in_hindi_dubbed_downloadtsuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/hiXjdKU/best_piano_lessons_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376379/normal_5ffbb2f98a68f.pdfIn PDF document text
    • http://hyipinvest.site/how_fast_is_a_yamaha_kodiak_450czjd7.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/2fc7c927-140d-44df-9736-661e3708e4b3/sonupokamisaras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6028ad15-887e-4ea1-ad33-35647a09e1c0/motorola_modem_sb6141_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fcac029-af52-487c-a64e-63168de652af/metasokekolatuwebesubiput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbd8805-86b5-42ad-abf7-094fd8817cfb/how_to_program_car_remote_to_chamberlain_garage_door_opener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7590a971-c82e-46f1-a1c1-0b0045667fcb/sewof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2850d11e-b165-4e6e-a242-0881a5239c8d/room_interior_design_software_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8408634-2d73-444a-8f9e-b7cd934d411e/how_much_does_tomtom_app_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ae9eeb-a0c3-4175-abed-ae915bc52a28/25742633093.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_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 5408 bytes
SHA-256: 6ac89ec7893d5116cb72e41442ae687f28784b4a8ae3ecdcb3740c482621f5bf
font_01_sfnt_off0000f880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF880 10084 bytes
SHA-256: 2184ab61afac471ec50b91fdef029dab027ccbf5ba4ef4d34bf1a26e42407de9

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