Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ce744ea2564c80…

MALICIOUS

PDF

74.0 KB Created: 2021-04-03 07:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07106a36089d2cccdd88e4a3a8f451fc SHA-1: e6e6e6b8258511a8f631da441b8cd309ce224ac4 SHA-256: 98ce744ea2564c8055749a264500ac3ca7a3b7b3a101bbdee2d813a2b1386887
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary purpose appears to be directing users to external sites, potentially for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.
  • 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://yafferge.ru/strik?utm_term=ilive+sound+bar+37+inch+bluetooth
    • https://nusimilanagazi.weebly.com/uploads/1/3/1/4/131454102/1065734.pdf
    • http://uscreditinquiry.info/pistol_muzzle_flash9qq79.pdf
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fd1d1efb9d25.pdf
    • https://tawugeri.weebly.com/uploads/1/3/4/7/134774142/035446a2ecc58f7.pdf
    • https://kukuwusak.weebly.com/uploads/1/3/1/3/131379738/vaponiserapuluzar.pdf
    • https://cdn-cms.f-static.net/uploads/4414172/normal_601417ab48d95.pdf
    • http://tdsevsvet.ru/jeramobobegezutasavapxqlbh.pdf
    • https://static.s123-cdn-static.com/uploads/4415745/normal_6000be9e3fb49.pdf
    • http://zoomita.space/disesujobusedefadovawoz8m.pdf
    • https://cdn-cms.f-static.net/uploads/4408587/normal_602644c20f55e.pdf
    • http://rollernefrit.xyz/2711008952310t65.pdf
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/wekevazikab-zonebonoxugadel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_573fb28619654ad7b450f873ff8b2c1e.pdf?index=true
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_e077d03090ab453ebdce5909f9188030.pdf?index=true
    • http://xufirusomuj.rf.gd/exhibition_design_portfolio.pdf
    • http://nexuvojof.epizy.com/que_es_arquitectura_bioclimatica.pdf
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_fd55247c34a54b8494ec534a54a0b321.pdf?index=true
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_c72d992fbce24e09a923f8419fe8a14a.pdf?index=true
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_85e8eec8904e4279899aa6adad12a89c.pdf?index=true
    • http://ripufos.epizy.com/believer_imagine_dragons_partitura_piano.pdf
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_0def37c9609e4511bdc495624afa9757.pdf?index=true
    • http://fufifaramulemi.rf.gd/25413398010.pdf
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_9bf29490604a4a43b4b9c35f2c487227.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dffc.bin
1262fc54183a06d2c0333b1be5663a33c093a2f81a38e2008537c549c3e72a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 5408 bytes
font_01_sfnt_off0000f25e.bin
56b8e4b2cd0a00fda80e28ae50276378f1d7bc3eff0fc39773bf3a099936291b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 11676 bytes

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