Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df6167f26d949a8…

MALICIOUS

PDF

92.0 KB Created: 2021-03-31 15:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 93cf77e7fcb52a24d3642bbd8c02020e SHA-1: b9f42b2dfcbb6876b2831ad7f0e400eb1e07cfe5 SHA-256: 7df6167f26d949a8578b260997679352b6a429b64b9505e26037791ba2a1a110
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, with a significant heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/123?utm_term=beirut+nightlife+guide PDF link annotation
    • http://vovodofozufora.iblogger.org/22217895292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_6032fd85256b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489241/normal_6021175397a47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465557/normal_6003ed2a5f7a4.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/description_du_tableau_le_voyageur_contemplant_une_mer_de_nuages.pdfIn PDF document text
    • https://cdn.sqhk.co/lerotakisisa/SEGZx6J/zedidoxotavaneke.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/hcZjbQw/ravopegopaborotupem.pdfIn PDF document text
    • https://cdn.sqhk.co/laxuweredex/idc1ijN/increase_decrease_percentage_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_604d031da728f.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/iMpxH2j/31135667648.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/hcjfqUj/dwyane_wade_agent_hank.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/5eddb567-0dc0-4ce1-bfd4-3f2afd37e4db/5076484153.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/solving_algebraic_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be2f8feb-bb61-4ebc-813b-798d1a86754f/miwatomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e781f16c-9c34-46b2-bd88-b28ecc9da7c0/my_cloud_macos_app.pdfIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_bd6a71d7a21642b184f9efd0a2a1fc85.pdf?index=trueIn PDF document text
    • http://terudej.rf.gd/jalafobejaxeturanuxo.pdfIn PDF document text
    • https://b7c0b8aa-2746-4b81-86ab-4dfcec723e12.filesusr.com/ugd/383078_7d8bda537b5d4214956eb7eb7967389a.pdf?index=trueIn PDF document text
    • http://padegijogul.atwebpages.com/99081298111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04082959-d96f-4caf-915d-af96a0cd1208/rosemarys_baby_cast.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 4832 bytes
SHA-256: c85c331431bc4e54d38add59cb1283babc7875dd63320e348c045a41da56bc02
font_01_sfnt_off00012b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3F 2608 bytes
SHA-256: bf7791b95fcbba738716522fff3ed3183f8566155b543135d1d254a0bb705dd0
font_02_sfnt_off000136cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136CC 12924 bytes
SHA-256: 7b8694c5ae983fdeb131a99a16ee4c808faf66f0438241c8315cebbd31341608

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