Malicious PDF — malware analysis report

Static analysis result for SHA-256 547fd5d1812d6239…

MALICIOUS

PDF

92.4 KB Created: 2021-09-04 01:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cfa6b9a6e66c5a81479ea8da4f92ef80 SHA-1: a875235944563213e7c9551d7a25dd4bcb40e80e SHA-256: 547fd5d1812d62394446cecfbf95887f8999edb1b92df3d885dc6e5ca0960da5
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites, indicating a link farm designed for phishing. The heuristic 'SE_SECRET_RECOVERY_LURE' strongly suggests the document's intent is to trick users into revealing sensitive recovery information, likely for cryptocurrency wallets or account access, impersonating brands like Apple. While no scripts were directly extracted, the nature of the links and the lure point towards a phishing attack, potentially leveraging embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://laborke.ru/uplcv?utm_term=create+pdf+android+apk.
  • 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://laborke.ru/uplcv?utm_term=create+pdf+android+apk PDF link annotation
    • https://people11people.gr/uploads/File/kebuforavovudikolipagez.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf4af6538e---zumovakigaweworenuse.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8847e2363---23202516430.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/873991e0fe89efcbd4250ddb0c248d78/savaxipukaneraregimafa.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210822_69E6F54262C020CE.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6rsmhpblhok44gashv4joinm1n/tevetiwakiweruw.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160791bba35c69---wujedobomobalupizadus.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/46989999095.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607a574152cbc---sokuwigebezuvoremi.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/2021819822152510.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/rogapetofuledagenu.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/tazus.pdfIn PDF document text
    • https://cahayamimpi1.com/contents//files/28315946919.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fb09e024b3---62134202881.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/44132980803.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607558032d56c---virizekixi.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29923074449.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/40g4nb2qdil1sh9p3fvhu1j9vl/51589866871.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/titupiwanopox.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/rufefelawakipajowajap.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef185286e---ginozu.pdfIn PDF document text
    • https://robertbah.si/files/file/55377988548.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_off0001013d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 20096 bytes
SHA-256: 69931049fab3eb2480ea4edb591b5915114323221d045339395f1ffaaf8517c6
font_01_sfnt_off000134b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD0 10400 bytes
SHA-256: db7e4c70f01f8f1102cd85abefd54281dbaaa1fcc106ee90ebe6826b2b6ec9d8

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