Malicious PDF — malware analysis report

Static analysis result for SHA-256 74183cb4be552581…

MALICIOUS

PDF

81.4 KB Created: 2021-04-14 05:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b46e23f99961250ee5f087aba1bba6b SHA-1: 1b51443518e3dc7eb8b194740433b3069d0c3a5a SHA-256: 74183cb4be5525812463112c9dfa651a4bb304ca4da8063f9edee8d1a686240a
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://soxebez.ru/strik?utm_term=history+and+philosophy+of+science+pdf+noun PDF link annotation
    • http://movawizaxaxato.mywebcommunity.org/bevodunoxuwone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_600844844ee3e.pdfIn PDF document text
    • https://zotofake.weebly.com/uploads/1/3/2/7/132741508/8e644105.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/0ae2b4f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_5fd30cd27f1e1.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/179967b3db615.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/jack_reacher_2012_actors.pdfIn PDF document text
    • https://favipipuwebex.weebly.com/uploads/1/3/5/3/135397367/vawunulaw.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/8d48c26a4b.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/bbc3f646fb.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/7465478.pdfIn PDF document text
    • https://gatodewa.weebly.com/uploads/1/3/4/6/134627503/dopedudew.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/58939935389.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/sinovoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5fd6315a82048.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/1af26019-b95a-4d7c-b98d-db3a20b26b1e/is_google_maps_timeline_accurate.pdfIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_a0748b0c86e548ab8a59ff231a90e647.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bfe050-f432-45b6-a559-953398a9622e/lotujejogawovogibanugoju.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_8a9fc97208b7477cbe82419e9db4186d.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 5308 bytes
SHA-256: 7151482ebe7bbd12fc7d8509f60c7f92dee3f8e0140b3533fa483d407d1a733f
font_01_sfnt_off0001131e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131E 11000 bytes
SHA-256: 62ea6ed63f88fb8be2a245845eb616f370047e49fbebbbe1091427885e1071f2

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