Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35fe335925f702d…

MALICIOUS

PDF

68.0 KB Created: 2021-06-10 10:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58128cb224bf9deffe0159f79b9a30bb SHA-1: 5a4342fa4ab37a63c9737a090a939724b8c5b103 SHA-256: f35fe335925f702d8c143a4515b1fd0fb25afd40aec6c8710d820fda01b4bb6c
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8740

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://medvor.ru/pbw?utm_term=snow+seeds+for+minecraft PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426953/normal_6044fa5cc551e.pdfIn PDF document text
    • https://wovuposekase.weebly.com/uploads/1/3/4/6/134613379/2e3680776e.pdfIn PDF document text
    • https://befufagu.weebly.com/uploads/1/3/1/3/131384284/jametomukaj-kuxabejuro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477409/normal_6016512b6ec0a.pdfIn PDF document text
    • https://fofelopuvamugav.weebly.com/uploads/1/3/4/7/134716477/gilegatadawona-kevux-minupuzolanaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408989/normal_6004bbf018638.pdfIn PDF document text
    • https://vixadabunukup.weebly.com/uploads/1/3/4/9/134902839/dikofokesevog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_5fd1e7ff60952.pdfIn PDF document text
    • https://lefexaro.weebly.com/uploads/1/3/5/3/135324439/vasol-negowerovofisi-nudunoxip.pdfIn PDF document text
    • https://diwopoko.weebly.com/uploads/1/3/4/5/134597367/5281768.pdfIn PDF document text
    • https://tifopenowotak.weebly.com/uploads/1/3/4/4/134480635/genijopivapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144896994/kms_windows_activator_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720a12f5-4e02-47db-9486-ca230f7b58da/33117716148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea970bd-100b-4fb4-98ad-64aafadaa3f5/xabod.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144752139/xeximi.pdfIn PDF document text
    • http://pebenuziwi.pbworks.com/w/file/fetch/144608613/how_to_fix_a_jammed_staple_gun.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/f/aimware_free_csgo.pdfIn PDF document text
    • http://bunemirudezo.pbworks.com/f/19350789728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c501e0f7-2465-4328-8e17-cd652e2d5a6f/tomtom_go_500_battery_not_charging.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/furifarenexarogafum.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/w/file/fetch/144604302/19072459303.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000debe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 5332 bytes
SHA-256: 2629c7e2c36b17ebe8a3ed7e14500a4c3d140c09d896f6712a997777d7b6894b
font_01_sfnt_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 11072 bytes
SHA-256: 39ebb00210a6b019e0f9921b69aff7ef636cda963b06f72268a69e847f68a66f

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