Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b32e3025de721fe…

MALICIOUS

PDF

83.6 KB Created: 2021-09-08 00:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6ef6dbdcf6088833630c2626e1923cb6 SHA-1: 3ec0e62e6240e6ba361656ea3fb7d5450fcdde6a SHA-256: 2b32e3025de721fedf81529c66dd690bedad02898ee3218472b214d26e75f01e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to PDF files hosted on compromised WordPress sites and other disposable hosting. The presence of multiple links to potentially malicious PDFs suggests an attempt to distribute malware or engage in SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://artenika.pl/fck/file/garinobevi.pdf In PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/03c6afc5ed607a76ebef1e515a68e789/4012990857.pdfIn PDF document text
    • http://saltyfeelings.com/userfiles/file/64456512993.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/3240522442.pdfIn PDF document text
    • https://birotex.rs/images/files/siwiv.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/tuvafatewid.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/rutevev.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a25c609cdda5e6ea46a52db9bfae4233/xopaluda.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136050b3837e---45747771338.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/famijeketemetotegomope.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/7005010551.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/50755696811.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8b3ed800ae9363a6e46590d68707c8ed/madovugoketugogi.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/kuxaforojijunoxunogebeges.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/letadabokov.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/litefefapejawumop.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/joruwuzubilisojuwodawipof.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/48655393944.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/tumutaripagetu.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/tunivujafosenimewimeg.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84fea0725e---lakowexupaxu.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/29a0c48ca42cc8ec5382d9b58328c4ff/guxas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kitchen+brigade+system+pdfPDF 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_off0000df1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1F 11144 bytes
SHA-256: 2a844627ae9f6cbfbbeea721050f1dca9ad8fe2616287ba948721005c6189aaa
font_01_sfnt_off0000f897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A9 18484 bytes
SHA-256: c11cc78a34e72e352c3f9b18f2cc44cffe3ff2db04c6bbacf9798aae15f6eaa1

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