Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84c6166230483db…

MALICIOUS

PDF

77.7 KB Created: 2021-04-07 08:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4e3b25749992bc15ebb6c9a6d318b4ab SHA-1: 1891c380245138ed50e728bc57613a6458b70a49 SHA-256: c84c6166230483db61c572eef93c7f06fcb49649c5a4bdf289c39f01f80366d6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=what+are+the+five+exponent+rules PDF link annotation
    • http://bejawutipage.mywebcommunity.org/amygdala_and_hippocampus.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/diibGfK/dune_book_3.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/ebgejd3/the_sims_mobile_apk_2020.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/gegufejeresojalirope.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/30732672150.pdfIn PDF document text
    • https://cdn.sqhk.co/dorumexogik/jatEid8/aqualife_3d_mod_apk_1._5._8.pdfIn PDF document text
    • http://futigovu.scienceontheweb.net/blister_buyers_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/aghori_mantra.pdfIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_9a839cf59c2242639f265084ef30d4d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70458b41-a63e-4ed9-b6bf-b6585592a66d/sword_art_online_fatal_bullet_walkthrough_part_1_no_commentary.pdfIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_dbc964e79b38459d96657d6d2d7acefa.pdf?index=trueIn PDF document text
    • https://34fef40c-4934-4c56-b24d-59915ed92566.filesusr.com/ugd/806295_3a8e7fb3bcf4489f89116e9763dfdff3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c987f8ab-bf44-4b1d-8db4-709afdb3c11d/how_to_reset_service_airbag_light_on_2007_silverado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166f9f32-f29c-4f1e-9a57-18232862c5b6/gedazaditap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98c07b4-7f71-496e-bfeb-6fa5d6b71d64/56399548153.pdfIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_3c141202047d49e28b331470aa73a080.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 5128 bytes
SHA-256: a2dfd7e5e6e1107d1810f5f4017cf922c4e3cfbe20b4472c0b14f132db0d60af
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 11032 bytes
SHA-256: 7f5d1fe0a21ff7a07d89e1f62ca39bf4ffa5ce844abb5b1577a4f77f1a4d673f

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