Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e638145f0a217a…

MALICIOUS

PDF

111.2 KB Created: 2021-06-26 05:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7d24702e0f96dc8905a0e62b2735e52 SHA-1: d3790ef249d7404e23ee83a3b915f0b0ac8f0689 SHA-256: 93e638145f0a217a5d43305188c152c390612ded3cecf4763e5127f75ce4770b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for phishing or malware distribution. The presence of numerous links to potentially compromised WordPress upload directories further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/lt8ndfg5ev1rmhn47h5bfbn7d3/befutowuwojizozavepiguru.pdf
    • https://cavalier-hundezucht.ch/userfiles/file/tuzefewifexegekiz.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae341ee9a9d---986994453.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2acff530335b75987d5869394483f35e/22666127421.pdf
    • https://hohsingfiber.com/ufiles/files/40178151806.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16074216183d06---9027256516.pdf
    • https://adepotcustom.com/UploadFiles/file/20210506173253134.pdf
    • https://arrayamed.com/userfiles/file/74258962444.pdf
    • http://hublihorse.com/uploads/userfiles/files/likeledasowoxosusomozaf.pdf
    • https://somogyplusz.hu/files/44047280062.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2ce432e706a64037eae5de8169dedbcf/rimakonovafobe.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078fc259090f---velives.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/0hmem6dn1oa45rg8durdi4jps6/vifigafesigovapaxigadep.pdf
    • http://aliceinformaticasrl.com/user/pages/ririvinobokukavapefa.pdf
    • http://toonesk.com/upload/17986344192.pdf
    • http://lapawan15.com/shop/fck_file/file/vurites.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4b9a6c4f3---buwoxufapojeluledeze.pdf
    • https://comobrew.com/newsite/images/user_uploads/file/nidurevanatosobow.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96547d8bc2---gujipukegiwudodasux.pdf
    • http://transsnabstroy.com/userfiles/file/loxonejusaposo.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748d6da9079---49874008683.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a26cde59899---derulenudejikezeveb.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/vk738grcg2ulv3t89k5uvdvkop/kazanutasa.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086b3bc023ea---riweju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+many+creatures+in+a+60+card+deck
    • 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_off000153f4.bin
9f3b5b89b4f6af5e57ff9f78b739acffc088315c40833f6aab215d9c40c2417e
pdf-font-stream PDF embedded font (sfnt) at offset 0x153F4 11160 bytes
font_01_sfnt_off00016e15.bin
4f0738c654427fb0a499a5e3612cbdb90f3d4504ade42517b908b108c86a472f
pdf-font-stream PDF embedded font (sfnt) at offset 0x16E15 16052 bytes
font_02_sfnt_off0001975f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1975F 16792 bytes