Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fda769ecf289ff0…

MALICIOUS

PDF

84.3 KB Created: 2021-06-25 23:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6e0ac861e40d0f6edfcc0cc7aafd4a4 SHA-1: 98ab61f99d6fb085b764b6a4aa7287ea485e8e6e SHA-256: 7fda769ecf289ff008bbb27e8786d2d8912c6fd1eac0f363ff0e8bc74d6541d8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via a link farm. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/3d8c37f96bcbdceabcd9078862ec8d83/93151640551.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7386be029---goxamepij.pdf
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210513044003140126we1eo3.pdf
    • http://unseenadventure.com/userfiles/file/mutulaxifowijojibe.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/c77m8b6euhmgef2jngr0pot41g/6985739769.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6d30d2d2---favifas.pdf
    • http://win-sonic.com/kida2018/ck_imgs/files/pejezapigaviwijumo.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775638a1ca1---naguvejof.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765a0419899---xulebe.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd5e70fba3---16623480415.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a57f7eb144---87794806423.pdf
    • http://remaining-mc.de/userfiles/file/17324814751.pdf
    • https://actorconseil.com/files/file/43892599995.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/eens79nn4cfl3q19m8u0nhs841/21486020771.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/41f412481f3e16934fca4d5ff1cb6367/fanopodovitagoka.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b442b534eee---39966075164.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/kh6v82slef60rae2hnfemqsakj/32203790521.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c07a26aa90e---mexepoladanil.pdf
    • https://diaochue.vn/userfiles/file/dozufowiporezu.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d947b722f---gifuvofilit.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ij6fdi113upjaeem1mn86lvp56/61098480041.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc89d69a761---meludomapujewuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=aloma+county+aundh
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cafe728c4---nujokajuwedujorikosisire.pdf
    • 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_off0000e79d.bin
a2376b851f72cdea37acf918ad9cb0d77977b6fcce8dcb717d4534ec33c22b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 17336 bytes
font_01_sfnt_off0001151c.bin
f7c45fb76e023573f208c209f1a329cea43e2534546ecf9dcf5e4f20d3791db2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1151C 10340 bytes
font_02_sfnt_off00012c4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4E 16792 bytes