Malicious PDF — malware analysis report

Static analysis result for SHA-256 e917ddca07c150cd…

MALICIOUS

PDF

108.3 KB Created: 2021-08-12 00:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 651bc55d0414ef3756044b3eb4e9f900 SHA-1: db2f9be76acd71cdaa5bd433a5dfa3d3d8c80b77 SHA-256: e917ddca07c150cdedd4948e080af8248b5e947c33a4fd12218da20b52e49d35
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is structured as a link farm, likely to direct users to malicious content or phishing sites. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=cub+scout+webelos+handbook+2018+pdf PDF link annotation
    • http://igorodstore.ru/files/userfiles/files/12108074526.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/33532174197.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/87766412461.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/jezutepupuvopufi.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a981aea2915---63391968114.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/796b342bcbbbabb0524e080b9c03fbde/fosolesexuzijukepisul.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/8325df90fdb3563412257e11904bf5f9/basaliwo.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abfbdf328e1---82190302150.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/59cf17da22d212b697c71d50284c8e0e/88465064373.pdfIn PDF document text
    • http://dollarplus98.com/images/upload/files/7266452124.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/f00a53011dab390cf6b1977f39dee21b/90826045949.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/c008a74f338cf55adf6cd0e16f1e5f41/xoranawozorarogulebi.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/73f8e289f5d89c2d94a4415f53f283aa/rivizupa.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/97908513860.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/97302912838.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/64345383018.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/41450640596.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a446389a4b2---50116929380.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/so95db1e8f7pltkppjf226td5t/renididuzewewalafefukevil.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af5736e9ba9---fepuvezaxida.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/38366109629.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/23c25e7ht5a4djn7ah7emoimmp/gerepejuzaririwerufadelo.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_off00013c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000154a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A3 11476 bytes
SHA-256: 930bcbba5c0ed6f8546868bea62ee5217e39ace0f5a1fe3e3ebfa42f7455c4bf
font_02_sfnt_off00016fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBC 19400 bytes
SHA-256: 7e5f63ad33f338c004611905afef1889da9755e609ad8ee1c4fc5c1691eec591

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