Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed6ba2218e36fb1…

MALICIOUS

PDF

110.4 KB Created: 2021-07-02 11:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dec64d0bb952729ee33b7a54d3627669 SHA-1: b6457df7e5794284cfef23b9ff46050fc421d3ae SHA-256: bed6ba2218e36fb16caf74b531d5707afb23f8e32bbd1cbf93f734024d6d68a9
196 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by multiple heuristics and a machine learning classifier, specifically flagging it as an advance-fee scam lure. It contains numerous embedded URLs, many pointing to compromised WordPress sites, which likely serve as part of a link farm to redirect victims. The primary attack pattern involves social engineering to trick users into believing they are receiving a lottery prize or parcel delivery, leading them to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=nhs+staff+discount
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/bt66rvtffddqad8no3q98ovcio/22927954064.pdf
    • http://penzionklara.cz/userfiles/file/60612764687.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/df2aec85f8a51caa941825bb08ffbc08/nadububibojabubonakon.pdf
    • http://alnoorcity.com/userfiles/file/ruxupozevijaj.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072035c3a569---44883127178.pdf
    • http://duda-tech.pl/dudatech/upload/file/86792470917.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/e9dd6197ab47256abdde244ec1aa0c48/79728440267.pdf
    • https://marblo.com/app/webroot/img/files/zugovuvimuraxamavupisuvij.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d60dce4d7---67874359792.pdf
    • https://tortugafilms.ca/adminfiles/file/dugexer.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a5450873d---zebexitaxivugobelinovenuv.pdf
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/00a0822040eb2f54a6158b085dd783df/gelijagabibixivakel.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c4755af374d---letusamimidepapa.pdf
    • https://grandhotelbulgaria.com/userfiles/file/kikoxafurifadunisujeba.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/f2008e8b532fccbc867c31f45d0e25b4/79318755489.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911e4e6177c---xafipurukapovexudabexulan.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16071d3c067d1a---novumoj.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf7e4d4d66---6841861253.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a822a17e5b5---57257055159.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/6ad4df6a91ac0c5f79657b25eb08f092/bitamopovirovug.pdf
    • http://chekeeh.ir/basefile/chekeehir/files/bukofa.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a899fe19b6---22857331483.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_off00014b24.bin
d638b9ded96a6eb6f6133db71ae7f2401ce170e81e713a139805037c0e908338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B24 18844 bytes
font_01_sfnt_off00017d42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D42 16792 bytes
font_02_sfnt_off00019559.bin
8321d9cb2d84bca0c0e73ed90bffded9cf40b0e48e040624b53911c25f5a13b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19559 10372 bytes

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