Malicious PDF — malware analysis report

Static analysis result for SHA-256 085fd0a46b185d85…

MALICIOUS

PDF

84.7 KB Created: 2021-09-03 21:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: aa46dc94785dd79a54e766054ed4e2c6 SHA-1: afc13e1c8dd57a98364ba50c4521db5cdad918be SHA-256: 085fd0a46b185d85d4f34cf841980a5c64e18f47adf3c5bcd7154cadcbf60ec6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs indicates tracking for marketing or malicious campaigns. ClamAV and ML classifiers strongly indicate malicious content, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://coretry.ru/uplcv?utm_term=nikon+df+user+manual PDF link annotation
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c2d6549d1---8578968158.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/simowizilokewusaxepame.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/xexabijikofuvekilidup.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/80888425854.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/ea9ddbfeada7d86c6bc99afb7a9fba1a/48680448490.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/89075696286.pdfIn PDF document text
    • http://secretinvitation.net/images/files/51532871978.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/fedepibi.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a2232e79ddd---53685911740.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eaf5ec8807---pagokunosa.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a3beb7a45---motiralukofifafavenexedek.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/8930838074.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/pifatetut.pdfIn PDF document text
    • http://flyingcarpetclementines.com/userfiles/files/fowekubuzujidilametu.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c684850053f---xodowosesolezibiwe.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/1dae281ed3387594075ed177a888f513/gipasazanovupi.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/43n37jb9a57es9g4rm0gqhd5tt/86434579110.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/74048203952.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/gugovit.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcfdb4edf7---zabikuvaruv.pdfIn PDF document text
    • https://ortechindustries.ca/ci/userfiles/files/39373700665.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/0a9fc612cf509d33dce7d630b1039d0e/loxironepi.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/jelefa.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/zikijifimiduv.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/hdeohpic4cn9bg3genoiidueln/94318002380.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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 18004 bytes
SHA-256: 37cc762e06d05122e72ae1a25a6ecb90279befb8d8e8cbc6669810f70ed12dac
font_01_sfnt_off000113f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C08 10588 bytes
SHA-256: c404cfb53cecaf6b4041dbd638af2a2c3476887129a8ac480b2838e5ee69a9e6

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