Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5abf3b789bdc7dd…

MALICIOUS

PDF

79.6 KB Created: 2021-05-30 00:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a498ea5a11c9493f4b2429951c69c3e1 SHA-1: a33ebc48d8c469a6fd002f2898c987770f503e38 SHA-256: e5abf3b789bdc7dd4ed179ccf4042d9efbbb740e7c56dff0bc67edb6d7297dbe
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, which is characteristic of a link farm used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://baarspo.ru/123?utm_term=antutu+ios+vs+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502439/normal_6048a3975d808.pdfIn PDF document text
    • https://jupifezugaj.weebly.com/uploads/1/3/0/7/130739886/8160533.pdfIn PDF document text
    • https://logifuvixejexa.weebly.com/uploads/1/3/6/0/136019385/loletuvo-vatapoxazofavit-fugetezalon-xorew.pdfIn PDF document text
    • https://motikefivenigem.weebly.com/uploads/1/3/4/7/134709332/bajewasesar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401983/normal_605d4bb3d6a28.pdfIn PDF document text
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/1054073.pdfIn PDF document text
    • https://gegirugotosizuk.weebly.com/uploads/1/3/5/3/135397722/2e881d4b2d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_602e346110af6.pdfIn PDF document text
    • https://bowodazuludov.weebly.com/uploads/1/3/4/7/134700376/nibuz.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/vubore-lerurosuko-givozon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_601de7f35c8b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bd15944c-a82f-40d0-bdf4-e48f949c68ad/tp-link_tl-wr710n_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be75fb61-9c7c-4758-bdcf-d64d76ce080a/how_long_does_a_100_mile_bike_race_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76cd672-3a21-4414-8d65-11198b285efa/26113187530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fb9a85-c6df-4c06-98b4-631b52c567bf/firuxexegotonevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c785ddc8-3d34-43cb-986e-598008c1cb73/onepress-plus_wordpress_theme_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a0a562-f549-4f68-bc8b-3498a4c842cb/what_candy_bars_are_gluten_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c625102-e47a-4f9a-8a5f-6a544f4937b4/ligizaketurazegagib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4059cc5d-ccaf-427a-b5a5-e6f40022e292/dopigizegekagidoxom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3341567-5c41-4190-874b-326ca10d6134/technical_drawing_interior_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd0c4fe-7ffb-462b-8c02-9d9f5aae4774/black_and_decker_circular_saw_blade_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3aa29f5-1b93-40c9-95ce-af528c3dfefb/77756381812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f97a66-af5b-4918-80ea-a846b17a51a2/48012127495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283cd374-4045-4ce3-992f-d0d593709689/tefujenubolipuvefawawa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 4600 bytes
SHA-256: ae7f114d929f78694567025259f78ee5158f7597b9f82052207d98fb4b674344
font_01_sfnt_off0000fd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 11584 bytes
SHA-256: 40156fb5006d70f0bd283d3c4f1891ea7c839bb29889e9004dd3f1ea48b14218
font_02_sfnt_off00012331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12331 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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