Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d345aae722ae547…

MALICIOUS

PDF

90.1 KB Created: 2021-08-03 00:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dcbde2a178e7eb265b626a5dee14f751 SHA-1: be20e928004330c3b8281a1e66fcb0e0d647b4ca SHA-256: 7d345aae722ae547aa18547e863d61c94932921768198fc496f367a65606e3ad
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous external links, many of which point to other PDF files hosted on compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=pavtube+video+converter+ultimate+portable PDF link annotation
    • https://advantagelic.com/singhania/downloads/file/96519988654.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/70c05f48d98a665300909fd67177f21c/vanevijotepotutomarojawo.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/7e64c4b2c9765bdfa76a385420ac14b9/bokuzamapef.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/95563497798.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/026ed2dee8d3fe411e9e1b4547d5987f/25064711497.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105282211029795.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210803050846_te4ecc.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/zelogegafaxejepudifaz.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f829db3cc6---13953618195.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/7a15e9555a9500eea623286ce912afdb/nozono.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ba459735015---84473928117.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/50101462823.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/wizutabosof.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160801a9bc5ff3---28115268074.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e90c5db1---xitepuzi.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/86986769011.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/10356123707.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/4ef1103b828bf7c595ac82b646c921ec/5361657087.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947a3086327---lijimononimamulabupenad.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076c76bb8917---difeka.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/063921933e0e66ed6828649f72dda513/tedemiwopidifosuvi.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/leleruronipodaxabivep.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0c14db5907458cd571412724ae18309e/nikepititajipore.pdfIn PDF document text
    • https://inncredel.com/uploads/jejelunezorelopaxopalad.pdfIn 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
    • 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_off0000f7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CD 18648 bytes
SHA-256: eee9788227d3de33e50ff47b88a1f470c47e7105444ef48d9e9124f751a64785
font_01_sfnt_off000127f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F3 10816 bytes
SHA-256: b4aca1e2cd880ed7213f74b6cfe2a1a05b5af7ffbad207b2365982545bf3f224
font_02_sfnt_off000140a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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