Malicious PDF — malware analysis report

Static analysis result for SHA-256 704f26c9675c8ba1…

MALICIOUS

PDF

85.2 KB Created: 2021-09-17 17:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3bc48c843f9d64a5a8e7853bd5221c9c SHA-1: 5bbda4cca96b9714f5f4a31783cad54a23942b7a SHA-256: 704f26c9675c8ba12370905b3c83bd7f73e7616880e06873c712246db44a0c94
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. Heuristics indicate this PDF is a phishing lure, likely intended to redirect users to malicious sites for credential harvesting or further malware delivery. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://sinojjacob.com/userfiles/file/ninorolofapiw.pdf In PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/30392178073.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/lelubaweto.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/71153029945.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/bokepitabirazutedilet.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/velepujonalodegekepexenek.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7014131432.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/85698653592.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/106a330da6811c5058a5cbc955d4c1fe/laretilafitavora.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/67839470018.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/sisagok.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356adc9cd4b---wajibuviwavasibapeguleda.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/fudisekix.pdfIn PDF document text
    • https://mentormedya.com/files/jidedijikulevivanuduvesuj.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gejifagosonebiximusole.pdfIn PDF document text
    • http://gurgaontaxi.com/pa/trainstation/uploads/image/file/83464969038.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1631597249.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/77232038934.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/6417008939.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/moverikuzajugejibajife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=live+cricket+tv+iphonePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 10212 bytes
SHA-256: 9de368e86ff6ea6420cd6381c4c507f77391589899e34231cf878de0f3fdf608
font_01_sfnt_off000100a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 18064 bytes
SHA-256: 3c1616d54d699d338666082a729fe547ddeb975054d530ecb0295f1418c4e43c
font_02_sfnt_off00012f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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