Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3f1aab8a5d2406…

MALICIOUS

PDF

78.4 KB Created: 2021-06-09 07:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b642c7adc3e16111c31fc218991b3f3 SHA-1: c899f0b99b8995eebc7d6c8b9a1a225079dfb342 SHA-256: 9e3f1aab8a5d2406fae4e9bd5d4c3425f9e01cbe8de535bba6fa4e4b28c65603
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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.
  • 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://xezojetit.ru/123?utm_term=balenciaga+triple+s+women%2527+s+size+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445550/normal_602b85ebbe3f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481420/normal_6016383eb4672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_605a284cb99c6.pdfIn PDF document text
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/putigawuderezoti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5fdfd00f353d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_6029a7e83b5d1.pdfIn PDF document text
    • https://foxegakadop.weebly.com/uploads/1/3/4/3/134337736/kenujiwidade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ridelox.pbworks.com/f/xenazijip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac14ce1-a70c-4051-9c67-8f104992caa7/zedenaxotubesovezodenas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023c02c1-7162-4d56-ab15-8b00a795632e/can_you_fry_turkey_chops.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5e8c8d-8ee7-475d-903c-2202ee88207a/the_sword_of_summer_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cec24e0-dd19-4ede-89fe-f1cc2f78ed3f/shark_ion_vacuum_cleaner_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9f970e-0809-41df-8add-87b845f2f1d6/dangerous_fellows_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd2c160-b7f2-4806-abe8-7f48e78d5898/mimob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08aa5ff2-5566-4cff-b0b8-e141ed29c478/how_to_pair_ue_boom_mini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e34646e-c70e-41f7-85cc-f2415510f7a9/80645208129.pdfIn PDF document text
    • http://gawalutibig.pbworks.com/w/file/fetch/144907215/subway_surfers_game_unlock_code.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/swift_black_substratum_theme_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37aa2cbd-5705-4dac-9450-e566e27ea792/whats_the_difference_between_uppababy_vista_2015_and_2017.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_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 5620 bytes
SHA-256: 30948f42e54b62b79e4a8edad3aa8fb39a9e9cd61242067a2066f2fbe6af037b
font_01_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 11708 bytes
SHA-256: 198e28ee7eb04e745d8bdb687a6c15e1d6fddddcdae299ca8cd6c12bc0e25cc3

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