Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbc06a2b693806d…

MALICIOUS

PDF

79.6 KB Created: 2021-06-26 20:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e49d4fe8dd4f1fac08bf8117db03d7d1 SHA-1: 1bed5fd5123c926690f6b0288249ae2a7e235f55 SHA-256: cdbc06a2b693806d87d4dccc725b4258011e7fae25815566ba3306b96ffd00c3
196 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a phishing or scam attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into paying fees for non-existent prizes or parcels. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85fab740a1---rawibofotutaxofa.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780745a4527---dadilenifatexobokudowezo.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773d86f0d65---64541708576.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/79b5555fcf75e2012731dc6236274d28/wusatuvuzom.pdf
    • https://golf-tout-terrain.com/publish/page/file/32441215114.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a56b1a3b0d7---wanagomut.pdf
    • https://101doctor.com/uploads/ckfiles/files/60b586ca0260d.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/efb37efc408d3a3a9285fbeca76a73a2/towavetesuwavipuwiwit.pdf
    • https://istanajp2.com/contents//files/10746137371.pdf
    • http://shreejians.com/userfiles/file/rifirujojemi.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af3c316abd---jasoberoripijepotit.pdf
    • http://www.sport-konyv.hu/userfiles/file/bumaxirewozuvonisaki.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/havogajaok4ss3is02k8n10osu/78157971927.pdf
    • https://grupo-kayros.com/userfiles/file/82763480942.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd1227db7---jusidasuvanovilexepar.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ad97d4428c9---kimaru.pdf
    • http://school19-zav.ru/userfiles/file/54552678402.pdf
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/wavojusisefodaxijaj.pdf
    • https://bjsteelvietnam.com/upload/fck/file/zefeloxoduvefuva.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/sah2m1dng7fa7drq8nsbbob4ue/76688229807.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089210fc5573---42340822746.pdf
    • https://feltshoe.com/userfiles/file/rufopujafigiziwuda.pdf
    • http://lbtech.kr/upfile/files/35252059750.pdf
    • http://zeguvietnam.com/uploads/ckfinder/files/72309555121.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785800c31d1---93689654085.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084ead0f26ad---tenupogexu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+internet+of+things+a+survey+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_off0000d335.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD335 16792 bytes
font_01_sfnt_off0000eb47.bin
0db6e818d0e14ad4c671a0b2884a61d677074fa330c21ad610823a1d064f8f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 16992 bytes
font_02_sfnt_off000117bb.bin
b036f4067608e5e3af461f96253f3e7597b6b53ccea9133f44710941a087c204
pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 10972 bytes