Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d8b599d7099bb0…

MALICIOUS

PDF

72.6 KB Created: 2021-03-24 20:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8b41f3020b651b5c5689a9ecf2c1f48a SHA-1: 46cddf0a9752e987b15769df0d43aa79e96ed4e6 SHA-256: a4d8b599d7099bb038a31d6b7da7d2dfbbd00afcd4bfa6ecd729462cbc11708d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=john+deere+z425+mower+reviews PDF link annotation
    • http://fitokaps.xyz/4286248316674bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_602af81f1f613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424405/normal_601647dd9d6a2.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/TgdbdS6/xozinovovajabofomawudo.pdfIn PDF document text
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/zarajupew.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/sesito.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/iaaiige/milwaukee_wood_cutting_sawzall_blades.pdfIn PDF document text
    • https://cdn.sqhk.co/xaveredero/hgct4Mb/xbox_series_s_for_sale_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_6057f8da5f58c.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/chcRxay/totuzoxezezilototato.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/mufivowifatolefaw.pdfIn PDF document text
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/57dda351ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_6015f04bbe195.pdfIn PDF document text
    • http://porn77.design/ruzujepobuwexegomivanuzasj4j3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_6011e26fb1106.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/fizereviduji.pdfIn PDF document text
    • http://arboozfilm.com/sears_craftsman_edger_carburetor3khj7.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/aashto_lrfd_pedestrian_bridge_design_specifications.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxukimu.myartsonline.com/periodic_table_with_ion_charges.pdfIn PDF document text
    • http://mekepeputidiji.epizy.com/advantages_of_aerial_photography.pdfIn PDF document text
    • http://wedizakur.epizy.com/gana_sudhakar_album_video_songs.pdfIn PDF document text
    • http://vizumun.rf.gd/rodisigidipuxiparajilofe.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_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5356 bytes
SHA-256: 1bd9f63a7c902e8d2c4773819793f352e72d223c09954253d6faba513539be6e
font_01_sfnt_off0000f05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 10772 bytes
SHA-256: c42c7be9970470ece9074911e748dc6be7d9525d17fbf914d580ac2d7e81d224

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