Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09dcb34172bcdd7…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 00:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3780a55c01c58d41664e08308b3bb46d SHA-1: 7ee514f5637df48bbfa57f8341a4b6e027b24386 SHA-256: c09dcb34172bcdd79a5dd94477d5ba87c32a8bd8ed78e6408c3022305fb72632
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into believing they need a password to access content, likely to bypass security measures. The embedded URL points to a domain associated with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=blanchard+macroeconomics+6th+pdf PDF link annotation
    • http://lebojabufi.medianewsonline.com/zukepago.pdfIn PDF document text
    • http://digitalmicroteter.xyz/jusinenavajujotuwojis534.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/vermintide_2_grimoire_disappear.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_6053d67e8730f.pdfIn PDF document text
    • http://ewwe.space/lathe_di_chadar_punjabi_songl8pps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_5fd965f58f32c.pdfIn PDF document text
    • http://kengoru.space/cuisinart_deluxe_convection_toaster_oven_costcovujmf.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/low_calorie_sweet_snacks_indian.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/forupokisip/kofirerimuxevitekexigapa.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/present_simple_spelling_rules_worksheet.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_d15cb2f4d7774881a52034cb0608fbcf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81916d20-f11d-4ae8-b625-387fb3317764/58827365855.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_e97db6cfab0f433d9cf3ba5f799c9d42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0321a481-157d-4f4e-af04-042a967d4186/zuxuziruzeda.pdfIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_1168c093d07b4ecd878995b51fac34d5.pdf?index=trueIn PDF document text
    • http://nanaxidimidi.atwebpages.com/basic_piano_songs.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_1a2f00e5fee04ba7b80184dee0121715.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5177f3df-8b98-40a2-8a38-81ce5f0aedb3/4_pics_1_word_level_2680.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/64327421866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2961e3ba-df03-4b9c-b369-39bdc9f9506d/2012_jeep_grand_cherokee_overland_v8_gas_mileage.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_off0000fb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB90 5596 bytes
SHA-256: 80011b091decec691a528a6a10a48abea41854bad5c1d0cb9a1e32c202b24c56
font_01_sfnt_off00010e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6B 11520 bytes
SHA-256: 5c7ca9e946f7e82442c18bb3a0888443affedddf0d2ba7fd7584e28f54322978

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