Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad046981c2a3427…

MALICIOUS

PDF

83.9 KB Created: 2021-07-18 21:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 386493ba5fd801e0cf459d73d5bf07fb SHA-1: 37fde322bc28590af794254fbd5981496191ac5e SHA-256: dad046981c2a34277b1a9e418203a9a7bda8d231a8001a97a34c8ac20476dcc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing and trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution mechanism for further malicious payloads, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/c1df1ae584ceb7f915343e974e23a275/55302210761.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/71aeb570430a5ad7fec97e8c54d24622/tasebowabexexitegurewaxuw.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608480a1eb955---4812251190.pdf
    • https://fertilizergranulatorprice.com/d/files/bilasojuvaxike.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/r5atrf04n3qqjq15pa694iq415/86059599989.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae764d03b4---9053925883.pdf
    • http://ledins.lv/cms/file/62158424496.pdf
    • http://technocom.pl/editor/file/10969520050.pdf
    • https://farmstead.tw/farmstead/upload/files/77116927149.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/3ohqblpqqct5r9k9ramsehlk87/wenakikokenu.pdf
    • http://fishtech.org/uploads/userfiles/file/file/lezejaj.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/l2se6buk4bich9fa7jgsv5t484/bejoximezefodomasesawe.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701af740af7---69034916983.pdf
    • http://aucoindeshalles.fr/menu/file/30160864244.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87ec1729e---53202539583.pdf
    • http://zap-interactive.com/uploads/files/38865296650.pdf
    • http://1utilaje.ro/mm/file/bubijuviwujijikobulix.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/138930c96ed002b5cd998f889632d7c0/7763638318.pdf
    • http://shuswapladystriders.ca/userfiles/file/74485198687.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/f208b2ba2c923dbceaf58c045963e3d8/funadadenosemidoze.pdf
    • https://pass-eco-energies.com/ckfinder/userfiles/files/kukered.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202152695308498.pdf
    • http://wtmongolia.com/materials/file/rovisowekekogadijifabaxoz.pdf
    • https://austdoorcaocap.com/upload/files/36971073874.pdf
    • https://henklinders.nl/henklinders/upload/files/favejamikogumesoro.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=do+things+shrink+in+the+washer+or+dryer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e556.bin
cb60250db8e900cd01074190acfc30c0ff6f9743affb60fe5ab5e9bcf4ca0b0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 16840 bytes
font_01_sfnt_off00011164.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 16792 bytes
font_02_sfnt_off0001297b.bin
e8e4c36614a3d03f2379664f71f6ea443939d25b561f988c5a27317ed801a1a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297B 10772 bytes