Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda73470af456425…

MALICIOUS

PDF

78.6 KB Created: 2021-09-14 09:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b76a492ff40b7b9cc75a1fa9930dea9b SHA-1: 9d4e27656bfdecedc4329d97db2b284f18184e89 SHA-256: cda73470af45642556ad5f78adb5e474e5fb7217188fc458d446338a25807da2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded JavaScript and external URIs suggests it is designed to exploit vulnerabilities or deliver further malicious content. The 'SE_CALLBACK_LURE' heuristic strongly indicates a phishing or tech-support scam pretext, aiming to trick the user into initiating a fraudulent phone call.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=how+to+transfer+contacts+from+broken+phone+to+computer+with+usb PDF link annotation
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/begos.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/49192901746.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/bidogodafo.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6f1545f08---79312518475.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/jazifekimufeb.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/41912461139.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614014a132a7d---lanofukubu.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/79667429458.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/nabitasawaki.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/68269552333.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/witiliz.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/fofilowiwena.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/f69bb468d79ad9c085fc81802a6b6b86/48985829190.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/81985895107.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/7374481023.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/11892938457.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/ketodatenuvopesokisip.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/rojurodu.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/mufetotojolad.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/31190660011.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/vutigevenedetinufagofum.pdfIn PDF document text
    • https://sanagustin.cl/files/25832454790.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/rowedakevejaxup.pdfIn PDF document text
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/xazefedejeg.pdfIn PDF document text
    • https://forums.androidcentral.com/showthread.php?t=20193&s=10bdfac707b114901f66a67d19f1795f&p=193421In 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
    • https://forums.androidcentral.com/showthread.php?t=20193&s=10bdfac707b114901f66a67d19f1795f&p=193421In 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_off0000ce66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 11108 bytes
SHA-256: e0ae8067ec0387e9c1c5c640722f6ac7d08380774f5dc7ee137c2a60036037f8
font_02_sfnt_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 16892 bytes
SHA-256: fc3152a3724e7803011262cb3fea11ffe2c415079deb8292d26b7b6239f7c7a5