Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc5d187064e7058…

MALICIOUS

PDF

76.2 KB Created: 2021-08-14 11:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1aad38d9f502c89d5fcc8aa63c237468 SHA-1: 909a71c2bf0f8d752d4a4234a587635060cc2614 SHA-256: 9fc5d187064e7058e3d853ca71527bb7b96f1b52dcc0544eaf47cfb3b7d60f38
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a visual download button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://synerhu.ru/uplcv?utm_term=jung+ajay+devgan+full+movie+hd PDF link annotation
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/53cf3edc74ddd2bcf966bcde255169be/77661988312.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/74382279707.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/lc23fe9vj61icvbdqeqov9cs1g/79772214729.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/ae50940ccb03ac0f49d315d124420368/juluviwulugux.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e294c103aacf711c2b8a40849ed07fb2/21102595814.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/292gtqvtdqu16cfmel9s6vq4bv/37160746789.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/buxejubamexutegu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607781b3092bd---pinuwozuvabetekatexeranus.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///logaremubofozixakevef.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6aa87a4599---kutusonekiloka.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/24696787620.pdfIn PDF document text
    • https://zold-kommando.hu/files/16709395895.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/84502062869.pdfIn PDF document text
    • http://crm333.com/documentos/file/jawopisolisaw.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/313bb09ed0c77132e3cfd465b4a99cab/ximetuto.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afaffed1002---fulipegew.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/edbe1eebbd9989746d85fa43827776fb/57054894651.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072520e4aef8---5543264869.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/hf280019a1b3aqe6k7pr6ta41n/balutufamuduxifepuritexot.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/74442396098.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210528_EA049EBE0CBA29AD.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f025e6f6a3df968281dd780807f5f86f/bomuzenafuxuloxe.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/zokodizifowewonere.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_off0000c5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F3 17156 bytes
SHA-256: ea3cb35a4cbe7599c123f756678670dc01758e46d9b23f9fdc65a215fb78384e
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10836 bytes
SHA-256: a2535e50b650a1629dce76e2074e06c5342a915333dcf8aa43fd728cf907517c
font_02_sfnt_off00010b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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