Malicious PDF — malware analysis report

Static analysis result for SHA-256 507f0bc0ae64f8db…

MALICIOUS

PDF

73.4 KB Created: 2021-03-20 20:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8246aef3bcd6bcc56af36ca298ac864d SHA-1: 6fd4bbf2df1e0de3dc6446fcf4210808e4aff1fc SHA-256: 507f0bc0ae64f8db64d3f390af024eca2f10a7a8f97fe2b9b558c4e780edd84c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF structure further support its role as a lure, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=acquisitions+incorporated+pdf+spells PDF link annotation
    • http://wupidubame.mywebcommunity.org/fibulafolariwifebalurejiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_603bf3953947a.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/ccna_service_provider_official_certification_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488330/normal_60462c373aaec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_6020b3a3084c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6044f7a5f041f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409819/normal_5fe4480fd017d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_601a6d5334871.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/myasthenia_gravis_in_dogs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469849/normal_5ff820bd6c846.pdfIn PDF document text
    • http://xegafutulon.iblogger.org/nedatodosome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_603e1cb82706c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konomubexidop.epizy.com/aashto_2010.pdfIn PDF document text
    • http://dodixuvizovov.epizy.com/american_horror_story_season_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/what_happens_after_the_inheritance_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/lugebirotel.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/chatbot_app_android_studio.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_0ba229bc7010414b9cc9295d77743dae.pdf?index=trueIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_84d27326fa1b402c95dbf2d6babd06dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/febopa/78588882735.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/gujarati_balgeet_mp4_video.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_off0000e044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE044 5264 bytes
SHA-256: 845d6d02af9106149ebf906fda68244cfd4bb8bf8e397e2b3a38a5a169089464
font_01_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 11236 bytes
SHA-256: b4ef113add780f9fcf6d52987d4485f14da4e6e2dda266cf470b0f6b4c39f40a

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