Malicious PDF — malware analysis report

Static analysis result for SHA-256 5122fd71f94ea26a…

MALICIOUS

PDF

124.2 KB Created: 2021-06-10 22:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8857525612d6b1227b697eebcbc211db SHA-1: 73d5c2297200c43283300858ed0b7121f7a8fdbd SHA-256: 5122fd71f94ea26a47dceb92779888b21e433d9c8f83a360f562cba19914cc13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://laborke.ru/uplcv?utm_term=download+we+found+love+in+a+hopeless+place PDF link annotation
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8a08bae97---90480161485.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/81347912494.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/salosemiti.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/tivase.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31d5dc7f8e---mitolutudefulomimopiba.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/761aad4d99ab94399ea4503591cee770/56742043953.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988ea48ff95---66209721900.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/f02516b2f81fffb12406af269c2b1ce6/dozuguw.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d40a9a1f2f642a6dd28c0d825c02f8e5/87005439577.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/95429707279.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c2d0ba800---gasuropizaraju.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160760d3189e9c---12529064731.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a281b2611---zudus.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/74429696640.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af93acab21a---80788633267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17756 5100 bytes
SHA-256: abc66bc8f26b6f135da1c7cc48af3cd9083386c251f97afb30ca8d897c437c21
font_01_sfnt_off000188bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188BC 1888 bytes
SHA-256: 3db0edf0d6764ac3b5c075e51844234502b2ca99c825d09852fc8733abb3e66f
font_02_sfnt_off000191cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191CF 13688 bytes
SHA-256: fe5024bdb04dbc1f96af7d9132f9d04ca9d93cb5230ec92c2a777c727fdc2499
font_03_sfnt_off0001bdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDEF 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_04_sfnt_off0001d2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2B6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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