Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed11a311e60b2a1…

MALICIOUS

PDF

74.1 KB Created: 2021-01-28 12:56:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 979c7a82906968077c18e1703f6eef11 SHA-1: 204272aa1606430e21873e95c088fb735012c3e2 SHA-256: 2ed11a311e60b2a160f555b6242c3236f798ec7933bf116294f0eb9f1d04829a
164 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The presence of a download button lure and the ML classifier flagging it as malicious further support this. The ClamAV detection confirms its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://baarspo.ru/aws?utm_term=caffitaly+s24+black+coffee+machine+manual PDF link annotation
    • https://borojixupoluba.weebly.com/uploads/1/3/5/3/135316148/ac0d6eb6f655.pdfIn PDF document text
    • https://gawuwusirijer.weebly.com/uploads/1/3/4/1/134108670/wudivilusakum_jesegoganupum.pdfIn PDF document text
    • http://wiwusigeronisu.66ghz.com/62224603426.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/29920981743.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/7c2f47999cce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://notewewagegev.rf.gd/lavilaxinaruduxolozavabe.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/85210534309.pdfIn PDF document text
    • http://zinezalidoratov.rf.gd/anaconda_navigator_windows_10.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/nukul.pdfIn PDF document text
    • http://vatamutotomo.epizy.com/31977313567.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/romodezepasirelabadevud.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/70444417907.pdfIn PDF document text
    • http://vofefigekoloru.epizy.com/nizufeg.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/amrita_virk_new_song_challa.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/siwuga.pdfIn PDF document text
    • http://nazifaba.rf.gd/finijaxixilovigidekikebu.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/amsterdam_central_station_platform_map.pdfIn PDF document text
    • http://kenugaderagof.epizy.com/arsne_lupin_gentleman_cambrioleur_maurice_leblanc.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/wixiwuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/kapigawawazamiwezomowilaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/dasutizi.pdfIn PDF document text
    • http://lokemuwebofeg.rf.gd/58462405299.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_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 5456 bytes
SHA-256: 6e81f03a8d3b7205963a7172e2c8be3aa1bb7bb44b57d138095440c131d3a3fb
font_01_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 10484 bytes
SHA-256: 0ebb264da7cd32e97b5ed08a5c5eeb917db916e6bb93aa8dca470172ac09ab9f

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