Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f32532afdad755d…

MALICIOUS

PDF

82.0 KB Created: 2021-03-09 02:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb1575268e0714647e4c1ee762229195 SHA-1: 0e577dd6de1d89528000216a198729124d882e59 SHA-256: 9f32532afdad755d6b693cbffcf13eb3ed15d2525e4dfa76652f93c5ca67fdc8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic PDF_SEO_LINK_FARM indicates a large number of generated links, suggesting an attempt to create a link farm for SEO manipulation or to host multiple malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=manual+onkyo+ht-s3500+espa%25C3%25B1ol
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ff1140dbe648.pdf
    • https://cdn-cms.f-static.net/uploads/4446511/normal_603f0887e5d09.pdf
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/levizojimaz.pdf
    • https://sodamosubiduv.weebly.com/uploads/1/3/4/0/134012739/6893174.pdf
    • https://vurabagugodemox.weebly.com/uploads/1/3/1/1/131164039/4615129.pdf
    • https://zumuwezejulo.weebly.com/uploads/1/3/1/4/131455722/wuges.pdf
    • https://static.s123-cdn-static.com/uploads/4419645/normal_5fc7ca3707d72.pdf
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/379316.pdf
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/sawafifamuf.pdf
    • https://pukefigagarit.weebly.com/uploads/1/3/1/4/131406744/jeravepukipedeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pugomonapoxuxe/posuxaximo.pdf
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_f7edc7edb68a4d0d8a5d97e698bb004a.pdf?index=true
    • https://s3.amazonaws.com/fopalew/zivilewenaxiraxigovu.pdf
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_2038ce2ddfc743f08f6d4dd910e7070b.pdf?index=true
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_f5237ab6a9274c1f9961f2ebda7bb420.pdf?index=true
    • https://s3.amazonaws.com/kujesulad/46560872835.pdf
    • https://s3.amazonaws.com/temujonuwu/united_nations_17_sustainable_development_goals.pdf
    • https://s3.amazonaws.com/satuja/anunnaki_bible.pdf
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_490cf5edbb834338bb4531a33bc98dc0.pdf?index=true
    • https://s3.amazonaws.com/vuliwisuwig/35028634795.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/android_10_samsung_galaxy_a30.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f465.bin
a217573ba4e7b9e94261f115c06575f841bed4edb64fd28831b5912652c76e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 5492 bytes
font_01_sfnt_off000106d6.bin
5927294b1bc5ae31d3c73a33088adee61ffd18aaa3dc8b4fae86cdb3ccd7a833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 10504 bytes
font_02_sfnt_off00012ac8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC8 4324 bytes

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