Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe21d66234e46e4…

MALICIOUS

PDF

75.8 KB Created: 2021-02-25 21:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d0ee8943ad58eac2b060e23b57d1af60 SHA-1: 2e1f874f62e2d919e5ffab660efddaedfb900b6c SHA-256: dfe21d66234e46e4804bce803e38ed5e5aa5ca1ccbfd19cb3f7fd6adc181645f
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The heuristic 'SE_DOWNLOAD_BUTTON' suggests a lure for downloading content, aligning with the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/award?keyword=how+to+download+charlie+and+the+chocolate+factory+full+movie+in+hindi PDF link annotation
    • http://tamakar.xyz/vegeputizinemepoxogozamaqln3.pdfIn PDF document text
    • http://urott-hu.com/what_forms_an_acidic_solution_in_watervidxs.pdfIn PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/8068046.pdfIn PDF document text
    • http://hotsales-com.xyz/8872478449728hrz.pdfIn PDF document text
    • http://vanlit.ru/1735264943bgtho.pdfIn PDF document text
    • http://delinapod.mypressonline.com/tibizipobebos.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/zasopogevifiwijijaxonenu.pdfIn PDF document text
    • http://golomashvanna.xyz/mugevufuf97bp.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/60285572584.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/shoretel_230_lost_password.pdfIn PDF document text
    • https://velupilarase.weebly.com/uploads/1/3/5/3/135341581/2582561.pdfIn PDF document text
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/butodisede_teponinipe_laked.pdfIn PDF document text
    • http://bioforce-co.site/11766453874aml4x.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/how_to_lose_weight_quickly_on_paleo.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/attribute_changer_portableykcyb.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/75319097261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/macbook_cd_format.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/makalah_liberalisme.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_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 5296 bytes
SHA-256: 9c8a4d3ca4c5c8a2c000e7d500b0e842441000417f0ddde031fb8ae55800dc03
font_01_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 10416 bytes
SHA-256: e6e2b0b68c97359ba2c7aa4fa776f936dac90332557bb289239e8b85d1526c1f

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