Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00c5bd3983bb244…

MALICIOUS

PDF

109.0 KB Created: 2021-03-23 03:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fb2e8af8d748ac73e0253babb97f601f SHA-1: d2854944a01272a4843944457a0f2d6ae61ed84f SHA-256: f00c5bd3983bb2447fbec4e147c4a90b807e6346d3af26091face9a5bc47af70
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, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URLs points to the document's role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://botokaw.ru/wix?keyword=how+to+draw+a+united+kingdom+flag PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454807/normal_604d21571fc45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_6002e32a04840.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495976/normal_5fc9ec703851c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_60589c30e69f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_6011c25f0becc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_60244f2d9b5c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5fd880e06cf85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503035/normal_5fee8697b6717.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_9df1141bcfd74991a9ba098f9e35bf9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/229a3f78-5b29-422c-96f6-735902f7f4a9/how_to_get_flash_plugin_on_chrome.pdfIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_b963c3ba94e4497dbf02a93a30880a53.pdf?index=trueIn PDF document text
    • http://gipenebome.epizy.com/5120085535.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_c70eb52b112f491bbd5c6a7e67e0358e.pdf?index=trueIn PDF document text
    • http://mudalulox.epizy.com/acunetix_10._5_full_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf49c26-37b0-44e8-9f49-e26a95fe0437/74183921660.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_66892c5238974131b9bd3d83767f5c61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee67515-9549-41f8-9a52-8731acc2ddb2/5_inch_height_gain_program_review.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_65ed7498eb5649d1becb43217601a197.pdf?index=trueIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_0ff6d624210845cfa486f92772eb1336.pdf?index=trueIn PDF document text
    • http://wogomud.epizy.com/sandisk_clip_sport_firmware_upgrade.pdfIn PDF document text
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_4b94fd6f621346248e11f006fdc38d22.pdf?index=trueIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_ad40c11f927a4824961be7968f09f7d2.pdf?index=trueIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_81e9ce76b6cf461386a4e6100ec51f8c.pdf?index=trueIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_dce7a06f018349ca82d08e480b3ae1f2.pdf?index=trueIn PDF document text
    • http://xobekorafoza.epizy.com/zenuginutadiresefizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e921ee-6e6f-4b11-9ef8-86e1ca345627/ejemplos_de_dispositivos_de_procesamiento_en_una_computadora.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17022 5164 bytes
SHA-256: 5436be0e92bef36514dc821be1359156b88e5068b799ffdead8854d93067348e
font_01_sfnt_off000181b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181B4 10644 bytes
SHA-256: 7656488cfc8802df46501748c2ef881207dd0bbb5cacaa93965f65ec79ef41e7

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