Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6ad84f698b7505…

MALICIOUS

PDF

85.8 KB Created: 2021-09-10 01:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 5cde72014002f9e309f03a2e777db377 SHA-1: 8794da45f690e0ff340581e32daa321bda717551 SHA-256: 1e6ad84f698b750502b581971024988df41af9460afe8d5c5423a2f5b54451be
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://doctour.hu/uploads/ckfinder/userfiles/files/12362176660.pdf In PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/vinezaxavesatug.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/boxotadajozosiwamoxi.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/mukojepafewomepu.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/26549478685.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/pawanurekexaf.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/19263390356.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/gafuretexo.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/80535658373.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/pikolizujegi.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/15449502877.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/nafulavedesowomoli.pdfIn PDF document text
    • https://raselapp.com/userfiles/file/kuwabevezususutoj.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/38204229836.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210901085727.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/96867666426.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/72673397353.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613a01ba3406e---23708657243.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/57573181274.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/vojuko.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/11547604469.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/87381148520.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/32247437258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+know+the+followers+of+a+private+accountPDF 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_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 18224 bytes
SHA-256: f464e7850a4329580bcbee627a6542e8b9c2d85df8226a11337ecfbe4eb2bc7a
font_02_sfnt_off00012fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAD 10912 bytes
SHA-256: d03e97d88afa1a8676830da648dc96b4d355d43038ca667016df143596787ee3