Malicious PDF — malware analysis report

Static analysis result for SHA-256 24957dd679cdc19d…

MALICIOUS

PDF

90.3 KB Created: 2021-08-06 04:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fd039034edb926d169f2fbac8bb4d14d SHA-1: 6ec032f08dd04618deca255c97f2926ef673bd4a SHA-256: 24957dd679cdc19d846d235321663ce900c380eab8fe5b6c39cba1fc63271485
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It functions as a link farm, directing users to various external URLs, some hosted on compromised WordPress sites, which likely serve as download locations for further malicious payloads. The presence of a visual download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=naruto+senki+war+of+shinobi+apk+mod+download PDF link annotation
    • https://nilsagame.com/calisma2/files/uploads/95276793991.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/44989292536.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/dakajawuvimonalazezeg.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1494775786609bb76494a49.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/1jkpcs949u8gsa9g8uv53p7ei0/xexamurevawamixi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/6cac35a3e1db08567aa80a2998f83fb1/59513743363.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5d70efaecf228ee041c352babf4e4e85/tipudomejibize.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/33526418394.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/418115cfbae8702018a5cfc614e2ce3d/vibipekadaj.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f65c5abfe9---wejiw.pdfIn PDF document text
    • https://medicula.pl/web/uploads/files/zefelezusujanonusagi.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160780f70499da---96072320773.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16080cf8c03e78---fakurekaxuribavawubi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f23d3fe57---xemuxebopado.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/xokakawupaxexibopebufek.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/76817875845.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/699f96502a34443972d4c15ab25103e2/42271154479.pdfIn PDF document text
    • http://indemo.pl/Image/files/mamukutanus.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160873aef933a2---92274231235.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/12773141482.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/sisamaxixixigadi.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/deserabavanedetojirevaf.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b901875dc17---kegadagim.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/16328722566.pdfIn PDF document text
    • http://teplospectr.ru/images/files/tegumejin.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a758fe716a7---30648802512.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/1d0s1sm6iqmqfumgd31m1adun0/57773825935.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b44dfc88c90f2db4ea8c4a02564bc245/vefajemifulinugosedubifem.pdfIn PDF document text
    • 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_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 17088 bytes
SHA-256: c51202a6b335844112ce318c7c274a54b700a4adbe36ee750b176305fe363a7a
font_01_sfnt_off00012830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14047 11156 bytes
SHA-256: 9847903a499efbf200eb95deb7ffbd4c4f05d42f15a00072db634d3fb96afa75

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