Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be6ceb104d5e9a4…

MALICIOUS

PDF

86.8 KB Created: 2021-07-03 00:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76a5b512fc97806a662bc6d4dc37cbff SHA-1: cf877926d6c700bb0f9410b6c6676ba09faf8fe9 SHA-256: 1be6ceb104d5e9a49efef653c409e37955be1d31d3672d0c8edf7353a58996f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://garglob.ru/uplcv?utm_term=educational+words+that+start+with+n
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ad765157d2e9517ade34969fc4cf9b99/tamonobef.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a861652f0a5---gujidoxivawedorenuwasi.pdf
    • https://cahayaapi1.com/contents//files/27562356456.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4380176338---mojuwareratafosawo.pdf
    • https://autosaloncenter.com/uploads/file/89837582221.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/836b5b4b951445252ae80f1ea02115a5/jenupefufumimo.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d0b0df51b0fe4e664bbc36ab6c603f9b/mofekupisukujizesab.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607661b765214---fofewoxukasudufodez.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/df725c5c0b952e3ce8dcd6edf60ddad5/dikonorija.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6e95593ff1ea5ce7743bb8e5eb73e2d5/10037444809.pdf
    • https://reitinguok.lt/userfiles/file/jiwikejepalarivejususisi.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d425a79eba---68519371600.pdf
    • https://mytopics.it/uploads/file/47803691508.pdf
    • http://renovator.cz/files/file/zipafutu.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/35ff6ac1d0ac0001e4e465c6355fdcf2/jodorutuvipuwoz.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b62d0cb63f1---58156087444.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160923b7617cc8---revan.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d60e50a63b8---musopizijiv.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d71ba7e1c---45016800362.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad858e4931---84861270881.pdf
    • http://provia-events.de/pics/fotos/1/file/vetunibepexufixaxemude.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78f91339b---21896434351.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609efd9f3aed7---38284212720.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f258.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 16792 bytes
font_01_sfnt_off00010a6a.bin
b7e96aeb6a1894e64de1db25da99bd9e0b21c3f2c233009f7548fd0e28ba89ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6A 16744 bytes
font_02_sfnt_off0001360b.bin
16ade7d11e568442364a9347a6bf57c685b388d76c542c9448c954ee3fec65a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1360B 10504 bytes

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