Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ed7ce05cecf2d4…

MALICIOUS

PDF

75.4 KB Created: 2021-09-24 08:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1e6974fd173b0c33805a37a9f2285dbc SHA-1: 841c0124def31e29ed59c9269f83b6619c2b0cbc SHA-256: f7ed7ce05cecf2d44a4ec19f201b761800e0141b1fb542c32888295b7e909a9c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing or tech-support scam, where the document likely prompts the user to call a phone number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to deceive users into engaging with fraudulent services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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 https://millersexpress.com/userfiles/file/19595530899.pdf In PDF document text
    • https://mimpishio2bet.com/contents/files/rowubiruzivoxokaravipej.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/18356948944.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/titoselaxemenogoxirajuka.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/29671335710.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/73931818034.pdfIn PDF document text
    • https://interconformity.ro/images/file/zokipora.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021914_12128_608.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/342851882.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/17837464455.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131d3aaea78f---6360706325.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/jiramubumoziluru.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/18980145231.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/jusenuzodod.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/51646418666.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe6ae1e786---99057124272.pdfIn PDF document text
    • http://houselandia.ru/files/senisewimo.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/roded.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/27857911072.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/68713619484.pdfIn PDF document text
    • http://markone-tools.com/upload/files/zazuj.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/1989861605.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/dawefobufapafifetawazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=cheat+ml+all+skinPDF 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_off0000c4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BE 10276 bytes
SHA-256: fad0ff29784318d73837e5807197d1a883e1890b46aef7fa1affe1d499f592ff
font_01_sfnt_off0000dbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 17248 bytes
SHA-256: bbda88eba15d8c7fbb521fd0191b2af90b196feeed1015aaf2dc56e8987e24b3