Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca93737890015b86…

MALICIOUS

PDF

88.7 KB Created: 2021-06-28 08:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02d523dd5a29c93463e3bddccb466f94 SHA-1: 9a17989210c698ecc881ad145cab5c3b5c0f81af SHA-256: ca93737890015b86ff0c0e9c2924067b2dff965802e0fae679d34ee3a162eccc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into paying fees for non-existent prizes or parcels. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with a phishing or scam campaign, likely delivered via email as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=quitclaim+deed+selling+property
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5ncfgi3uerqgikk7r872t0bctn/33429741152.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaac8b6c1f---fivovezekefali.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4c069d99d---pogebidagiv.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/153b0351d6f08c4fdd5eefd9b7b19614/suvizorumibuvafedaw.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cf6133d52---12351699698.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/810c6c968b0004d8bdbc44dcab60b9db/xonabakefaraw.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/1e8aebaa3e7316e6ed7096e8f3e724c6/gagelopunufalokexawudeg.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a06de9b2ce6---2356717107.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/ac8ce8e59b57679845bd61e85ff6bfd7/51351593934.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc14eede61f---worutatixumur.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609201d84f6ee---fuludepizirasojon.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40829e4081---rilikifitesaregorekip.pdf
    • http://abwingsva.com/uploads/files/93203085292.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/k3a7934fqlk7qh5c5dbuikebn7/51967055124.pdf
    • https://girl0229960192.com/upload/users/files/kejofibiramavenupin.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4b0749eb2106c222e21b0d5461610402/savewawapimiwad.pdf
    • http://rcot.by/pics/files/2635381971.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/c98d541cf3465a6ebccd39d7f8f28745/71515017394.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d92be7c61f7---sipenagenobowupowot.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/e90c8dc5e35031be514654232ee20045/70111803200.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e48208247---66559808788.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/hh4ea3f4ona23130honnhnhno5/72178354618.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5c725398a838d2ee9f99b53e7e53f041/xedolibogotevusixodaz.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_off0000f879.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 16792 bytes
font_01_sfnt_off0001108b.bin
92cd4ba87b0abf348cdc56e25c75b8f74cfa35719467fef72df15224c53104dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1108B 16620 bytes
font_02_sfnt_off00013b97.bin
040539ec7532c5f5cfa82d7946ceee3e70994d6a57c2441c49516a8909585ea3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B97 11128 bytes