Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0204007f039fdb…

MALICIOUS

PDF

85.8 KB Created: 2021-06-28 09:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83d37ff12eaa8594b0ea3574d8630ffc SHA-1: 5f0c054af569f5818305b8033d1010cbe3c45978 SHA-256: df0204007f039fdbf3b2f01ab2086bf18c8e4d7572e15525c967a1e35c8fbab2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised WordPress sites. This suggests the document is designed as a link farm to distribute traffic to potentially malicious or phishing destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160acc9cd2cb4a---48297853602.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0b4250d31---39268499220.pdf
    • https://aashianarealty.com/file/54397318369.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/163d8a56b594897cc4933aa85eca15c2/90499204485.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/q8l4pgpc9heh1vacbgu2of09u6/wagavawapaw.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/32f458c5ba1852af41517924bb6b05ab/17794405121.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096f6152c0d0---32894661714.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fc10a1a69---difafanirukab.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb6ca9c9a9---34724126085.pdf
    • http://s-privod.ru/userfiles/file/74650937017.pdf
    • http://softwarefactory.nl/images/file/tomosovupozekeren.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609caa9f3e431---xitupidutugebu.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/6818df882a8129236cd2d468f863cc38/94459799636.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/be1d8690a7c55e5f17a40914353c234a/9216552177.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/1e391bb190bfb29bd60781caaf3b41d5/vebegowikarumomepuxe.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/37840115e3f043e540fc01cf54b2de2d/35190099514.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3a559909---2274940887.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e64493dab---13705868148.pdf
    • https://ytdrive.com/CKEdit/upload/files/surabinogonilow.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6689f04dd4d622cbf5dd3f4f1d3b056e/59508928802.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fcac624d2---dofuwo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9c3495327---43172213189.pdf
    • http://dongphuctqueen.com/upload/files/85216023242.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45fdb3078a---jofuxexomuvovukazi.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/q51b80ia1fk7ngoovtq16qe74m/41544576106.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=product+launch+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_off0000ebec.bin
adeaff539a307568b705826dff9af3090089b89a2e9b8bc3bee40f7566636cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 10424 bytes
font_01_sfnt_off0001036e.bin
fc4a8b77c3e7eb2b6ef1449f6c56c832ffdd6d35cd144bd2cac674cf3a5cd260
pdf-font-stream PDF embedded font (sfnt) at offset 0x1036E 18096 bytes
font_02_sfnt_off0001321a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1321A 16792 bytes