Malicious PDF — malware analysis report

Static analysis result for SHA-256 df46047b1a1047f8…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 02:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 989016b6763dd02aad7086003a6a3632 SHA-1: b8a6315a15de364e0677a7c15be184d0720a1374 SHA-256: df46047b1a1047f82aafb87ef334f76448bc9410a0751bfe923b7dc795e838c4
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The presence of these links suggests an attempt to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/89b85484d86da9de9d79ef8c06797605/20355292101.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ffe7c8387---wojusajujaxaloxeguxe.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/90c7v9cuck2nhdkkrvic121op3/rolas.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609674cb8c4ca---83162488004.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3754b1d31---korosawebemaritopa.pdf
    • http://www.dismaplant.com/ckfinder/userfiles/files/58338780467.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/tgoqj4flp0i2ae9n1saur6c3r6/63571974632.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a84fe79d2---wopudisevenazes.pdf
    • http://atenngo.com/admin/sites/site/documents/5958861417.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf980cc173b---67656384520.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a528ec0c0---59593522795.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099c24974b51---50797594441.pdf
    • http://studioboscono.it/userfiles/files/58565107810.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/qslajuj84vcjv86cgq1q1svtun/84087327640.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086674bc999a---38522763053.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df78fb0d45---9213651092.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4d4ce9d60---29944414071.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/lupumufurogigalag.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/hb4d8g7460kfkuiq8aq9es4k63/jeben.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/21293992514.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/e518b9e8815dc76807cb55ff2d0dc05f/69231951241.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ccv8sfh8lij0ommkt5jqkirdji/6197727525.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/ef76abf2ce2592f9f75b8c5f0da0541e/sifitijofivifobujaxunadun.pdf
    • http://ersatzmonitor.de/userfiles/file/37222174947.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=mike+trout+biography
    • 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_off0000ee21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE21 16792 bytes
font_01_sfnt_off00010638.bin
537f337fec07b9754572725f708e2405b929529b3d515e9beb662edcb2dd882e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 10652 bytes
font_02_sfnt_off00011e96.bin
b99e70af00330fb8fe0ccb0b0bbf6c78899cb7fec22855becad37f0f78f6ff7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E96 17720 bytes