Malicious PDF — malware analysis report

Static analysis result for SHA-256 09126071207e0326…

MALICIOUS

PDF

84.4 KB Created: 2021-09-12 11:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 467cb123153ad14d0450d16b63a9c4a3 SHA-1: 4e3d510793e1ca2a9429544f1b052a08304db1a7 SHA-256: 09126071207e03262f42fb951de9af772db6a3af077601c7448ca80a76a5a1db
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload directories, suggesting an attempt to distribute malware. The document's structure and heuristics indicate it functions as a link farm, potentially luring users to download malicious software or further exploit kits. The embedded JavaScript is likely intended to facilitate the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://laborke.ru/uplcv?utm_term=download+photoshop+full+crack+kuyhaa PDF link annotation
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613ba1da98598---xovim.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/mexosijupudatozubizitinef.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/kafunegutotudovure.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613021b29b395---rezoropofomezusijuvidavo.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/lotomefenidosuboso.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a90121f100---kobadidalozab.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/xatapojix.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/53312747661.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109100007552939.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/tefevuzudoril.pdfIn PDF document text
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/66566646628.pdfIn PDF document text
    • http://pileki.com/imgup/file/84653716663.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/49431615827.pdfIn PDF document text
    • http://www.centralperdana.com/file/3117538077.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/48741939441.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/91191091668.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/wotevebujid.pdfIn PDF document text
    • http://full814.com/upload/files/38303051424.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/navefizelumajeku.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/4423211020.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/76691138392.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/45615997212.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5384f300ed46efab98d1129a5e83244d/19414697814.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/39309893002.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_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEF 10884 bytes
SHA-256: fc3488316d07c5ac0114209bd68e425b73c751d531e0cffa4a41f1830d449834
font_02_sfnt_off0001162a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162A 17740 bytes
SHA-256: 9cc3f717079be2b49f01da6b822a7915f1f9af1aa1f42350a6f3bc121b615535

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