Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e1453170aa9e1c…

MALICIOUS

PDF

90.6 KB Created: 2021-06-30 20:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7460237dc35a826a39e6e5b3c01a6ce2 SHA-1: 0c9e67830b2d1c37b810397661ee5990c7758f41 SHA-256: 46e1453170aa9e1c4aae2814997d17ee2434dcd39104266741d6e681f815c3f4
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous links pointing to compromised CMS uploads and disposable hosting suggests a link farm designed to redirect users to malicious sites. The file's structure and embedded URLs align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608297bbdffa4---96490191364.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c9c227d9a---sagewotuzo.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/biwekiwesore.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/27e996557c292eb1a58c09adfc1592f5/menedalunobofu.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/09dc88418510b545f3e97b0f3808a56a/49966348002.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/karatidarozato.pdf
    • http://broadmoor79.com/clients/864886/File/wukoz.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/dac3635198d01a38bfe64221496ed15a/80908973355.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/520d7b4832f330b4196b3ff76707f08c/sezorufil.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/084t13pke8d6va7k3ndh8anmo2/woragoxunopigepisodi.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c2ac2d991cf4f4e8bb636568830ca347/zuzotubofifoxijemotilol.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a20872ffd2---61022328365.pdf
    • http://magogaralbamoble.com/galeria/files/noburanumopasapi.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd804e6360a---xarezonutufix.pdf
    • https://aslimitada.com/userfiles/file/23421789531.pdf
    • http://taikenplan.jp/ckfinder/userfiles/files/diwivofufawokojal.pdf
    • http://lookkorea.net/userfiles/file/25086076529.pdf
    • http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/54546060004.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ebffc3b1e---zizidarejozujose.pdf
    • http://maasmartcity.com/userfiles/file/5638935545.pdf
    • http://www.aluvascientific.com/UserFiles/file/13655784637.pdf
    • http://adamlegal.com/userfiles/file/jisotimudalasogi.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/f283df96945402deca096b39919ba480/38677579963.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=paul+walker+fast+and+furious
    • 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_off0000fbf0.bin
b37445ce7f8fbe67c5136eb91094c949a03526e08814edbb61cf18ec8e6929c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 18496 bytes
font_01_sfnt_off00012c87.bin
91009691687301b93397bcf79ca6477dc9ea79ab70300c2bca3d772c43d09d4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 10624 bytes
font_02_sfnt_off0001450f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1450F 16792 bytes