Malicious PDF — malware analysis report

Static analysis result for SHA-256 d567f1d585cf13bc…

MALICIOUS

PDF

68.2 KB Created: 2021-09-26 07:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9ff2a997837b4a3663a3bf5edabe18b5 SHA-1: a798bbc69f43364ed4e0ec261efe68de0c71ef73 SHA-256: d567f1d585cf13bc13806974d262997dc3a683df808ce9b4da7b0a847d7a8b9f
146 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing campaigns, and contains numerous links to external domains. ClamAV and an ML classifier flagged this file as malicious, specifically as a phishing trojan. The presence of multiple unknown URLs suggests a potential distribution or redirection mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://fundoohairstyles.com/hairstyler/images/file/finiv.pdf In PDF document text
    • https://rwd1.thadv.com/upload/files/42069659678.pdfIn PDF document text
    • https://msiutilities.net/documents/kovafatotiduj.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/kavawewimesafimife.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/zewenorubutunov.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/wetuwesabitenapulo.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/5389407324.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/kepetolotodebexutoduw.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/zorurodelexupiwidelawux.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/geduwevi.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96873013268.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zivuziwubosasukuv.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/sipefuju.pdfIn PDF document text
    • http://vecsecity.info/editor_up/kapubutopunos.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/fexowex.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/pobepik.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/jevirupig.pdfIn PDF document text
    • http://adfaveo.com/image/files/20210923_140744.pdfIn PDF document text
    • http://medi-sen.com/files/files/43220552505.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/towudekuwibusufabil.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/5378777633.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/litigotimezat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=farmville+hack+iosPDF 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_off0000b076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB076 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC888 14184 bytes
SHA-256: 2aa49526e0f3af28d954aa3f8b77a66c46568ac98a76cf3a5f2e1e89add413ed
font_02_sfnt_off0000ebce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCE 10428 bytes
SHA-256: f16ecc1f8e42f7069ab6035b9ac8a6033bb208e30eadcac70d5e1632f6a32e06

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