Malicious PDF — malware analysis report

Static analysis result for SHA-256 809222267c0a651a…

MALICIOUS

PDF

73.9 KB Created: 2021-09-26 07:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0c34b22db5b5c84c700a2083fc5afd3d SHA-1: 4619caf4eab3f95d16cbdba911e956864935b782 SHA-256: 809222267c0a651a029b1e079fc37db98bbb81e8d588d1845f14f47fcc6261d8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, likely to facilitate further stages of an attack or to directly phish information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://antonioruizabogados.es/userfiles/file/94235842215.pdf In PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/24501421393.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/lusebisuf.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/44487000149.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/77261879386.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/118d66b7df3c7fe00511e5b99dc47167/gupijogos.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/99267265311.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/rezijilurofimana.pdfIn PDF document text
    • http://sial.pl/galeria/file/fezale.pdfIn PDF document text
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/99898212488.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210905084428771358.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161482e785320b---pubezalamogesejowuzowag.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/ladikiniwom.pdfIn PDF document text
    • https://felixtrail.com/imagini_ws/45256836213.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/sinavofapifapuwitowag.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/fumaliselil.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/rukukeriloweri.pdfIn PDF document text
    • https://eclearusa.com/images/file/winemowuwegi.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/84542871780.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/xumoriwogelafu.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/nuxufufad.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/85298087223.pdfIn PDF document text
    • https://31app.com/userfiles/file/52333176544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=plm+pdf+gratisPDF 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_off0000ba74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA74 18524 bytes
SHA-256: 8ccfa7aa75c669b68f82d8e006c6efa532678dd5e4a5240d61f38c0b6e3d9e4e
font_01_sfnt_off0000eaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA4 10488 bytes
SHA-256: 3007254eaa0165eaa726a43d317983ffb053f539b6e8045ff1037d96b0b55fb2
font_02_sfnt_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1