Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e772b1f343fb6c4…

MALICIOUS

PDF

83.7 KB Created: 2021-06-27 01:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1ae7aa91ff3bdd0336d1e18a3c1e8047 SHA-1: 73fcf1a1f647fc0d795568700fe873d6be065b39 SHA-256: 5e772b1f343fb6c41e36bc356cac59709d42ca6b2a9f9b09564b645c3182cb41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous external URLs, many hosted on disposable or compromised domains, suggesting a phishing or malware distribution attempt. The document body is unreadable binary data, indicating it's not intended for user consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cimkezes.hu/uploads/ckfinder/userfiles/files/kanasabosimoxitaj.pdf In PDF document text
    • http://n2nlah.org/UserFiles/file/56430518670.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/rohn2m2lokm43pb1pbvet65d2t/74875046238.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gepogulibimusewodu.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/wojagepatomikireki.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/juxanogufazepitenado.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072f0dd3fe8c---munuso.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b897e32b5c9690ee28dafa0ad29cb06f/kikadawuronuxakaraxazome.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/95124123998.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/bffb7288a936c5c175ce3709c3ac9b43/lixoviviruxipoxuwowa.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/c4f6b139e4ca892e53deb5a06b3626fe/87709655186.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/fsagolubnj4elv1rsm23aschtv/49297281552.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/71555621949.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/1330358044.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/45297f346cb3ed5ee42d4593b03ad740/95261103709.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff9856b0a2---28009197479.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/ruvesoruvivunefufikasepin.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/80691689953.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f840c4a32a---nixadotimila.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a886257d9f7---86097068976.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080f69537103---49106588176.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65eea9acb---82876079593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+meaning+of+devisePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 10584 bytes
SHA-256: 5e15aa41518c1a288ee0358cdff5c465b8741116a95d8fea92a491d2884f56a2
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11098 18204 bytes
SHA-256: 74fffad880687caa694017595c57600f4a8573ee2de8bd1ed069abaac8adea48

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