Malicious PDF — malware analysis report

Static analysis result for SHA-256 05760fbcf60e6071…

MALICIOUS

PDF

74.1 KB Created: 2021-05-30 20:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a4293b26829b6c53bcbed56684bb546 SHA-1: e123b0ab85db849c7e7ca1e69875b13c428af8ec SHA-256: 05760fbcf60e607151463ebf33d28c15cf7b5408061cc81c5531b0981705f951
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://maypoin.ru/strik?utm_term=how+to+get+free+robux+in+2020+may PDF link annotation
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/8316236.pdfIn PDF document text
    • https://wusafasugulub.weebly.com/uploads/1/3/4/5/134586051/zidejol-romob-baninokenid.pdfIn PDF document text
    • https://leloturopuroka.weebly.com/uploads/1/3/5/9/135956930/53b67.pdfIn PDF document text
    • https://widawukilifuduz.weebly.com/uploads/1/3/5/3/135398171/3070434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_60384df083c30.pdfIn PDF document text
    • https://fisuxujatuma.weebly.com/uploads/1/3/5/3/135345375/0893c15.pdfIn PDF document text
    • https://xatawozenovug.weebly.com/uploads/1/3/4/8/134886035/zukumizip-peparoke-lajonaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_600b15eb72260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_605567265e762.pdfIn PDF document text
    • https://xexunejakex.weebly.com/uploads/1/3/4/2/134266262/66f0eedae707c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_600bd0fa6edb0.pdfIn PDF document text
    • https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/9abca92d.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/be8b61c6-af21-4adf-a844-0be4d14139d5/24751979443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896c8a70-9c65-453b-8fef-5aba96450f28/is_keystone_pipeline_complete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed5bb8b-da41-4532-afe3-c24a213a950d/nidozogapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d446c2dd-8a6e-4ffa-82e6-efdca85a1323/2001_toyota_tacoma_maintenance_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd64461-f780-4a95-b967-206552abd9da/tom_sawyer_und_huckleberry_finn_film_1968_darsteller.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

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_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5512 bytes
SHA-256: 5e49e1fd2b0106774d7a08ff01b188206ae955aacec003d4fa27162dc2b3e796
font_01_sfnt_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 11168 bytes
SHA-256: 56a4dd6d44cb5ade8889ffd06e8f2b9b399c7b33d916f170eda599c7760ea230

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