Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65feecfb10b1dd1…

MALICIOUS

PDF

136.6 KB Created: 2021-06-26 09:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a265ca97faebdadd8a9058118103acd7 SHA-1: 84f1a94c1112d3c843e44c92dd303b6f86718d51 SHA-256: f65feecfb10b1dd11a5a142723ca7ae793b9d4dfceaeaeefc1e6529fd604f657
196 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a distribution network for fraudulent content. The document's purpose is to trick users into paying fees for non-existent prizes or parcels.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://bajcsidavidfoto.com/_user/file/78748780224.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb460d99115---45227067447.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/23258203717.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160750c00a3eef---pozuwefasiva.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af95e55aa97---52476827307.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/be5974076a901c023ad59aa6a9e20a3a/69828376472.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607972cab17b9---20190165513.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844de23fd4c---53230236491.pdf
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/jivogakajowanale.pdf
    • http://iehyun.com/editorupload/file/vojegaridegusozudov.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16087cb9e1719b---nasurolaruzitimaxifarese.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c318d51742f---gajuzovudavifatu.pdf
    • https://cvsc.co/userfiles/file/47040612894.pdf
    • http://veterina-hrib.cz/user-uploads/files/lajunu.pdf
    • https://hogies.com/includes/template/uploads/file/35210128972.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/83406a0aff7754f8b9575be5fd52325c/24425956583.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608380fe8fde2---98171937640.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160ae46c4ed4de---39289506918.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/nqvdc9qpqvbanp96b7mesiv6r5/96267816287.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/0319682783f13649c86092ac74c23502/jibomewi.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/c6055e278781bfe20362abae15bc305a/47419521722.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3c18fff227991ab20f22a3512c514279/salevukekizalaf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=primetime+emmy+award+for+outstanding+supporting+actress+in+a+comedy+series
    • 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_off0001b051.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B051 16792 bytes
font_01_sfnt_off0001c863.bin
07715c801dfcf0014d453245cf6e4d1432725b1894c57a688211ac340bed4198
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C863 18944 bytes
font_02_sfnt_off0001fac6.bin
f0b07f6e3b7b2d71d41702dd291f465e9a256ee58c1492bca1aa2da7ba3c6d23
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FAC6 11220 bytes