Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc90f823a501406…

MALICIOUS

PDF

99.6 KB Created: 2021-07-10 05:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61216b65296c7e7125f05a79d01249b4 SHA-1: 0c9f771a395d8c3298d5c02ee9d911c8a2179ad6 SHA-256: cfc90f823a501406da4176f432296164bd5e81c775cfd5de7f90d1c7b5bc4a36
196 Risk Score

Malware Insights

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

This PDF document is identified as a malicious advance-fee scam, likely intended to trick recipients into paying for a fake prize or parcel delivery. The document contains numerous links to external PDFs hosted on various websites, many of which appear to be compromised or disposable, suggesting a link farm used to distribute the scam content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/a66fc106f9b5b6a1b3d800e22ec79b2f/dajawamasojugijis.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/636a7bd932ef82230c66f41c460b6b05/29615551637.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7fb81a3f8b---bozugilosap.pdf
    • http://yaeram.com/userData/board/file/joromaz.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/32kd3uon8ht8uo1re2r11h6k53/bewewakolileputofaxidof.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/0d901ccc387fd5f79b988e1ea1718268/56775653624.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1d9ca0672---dapewanibaguravakokojip.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b73bf782132---7648690446.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/295b376a00821f8bbe03640e94847802/wodavinelelalamu.pdf
    • http://elitaliaweb.it/upload/file/34170082062.pdf
    • http://mywayrtk.info/userfiles/file/15944096009.pdf
    • http://capital96.com/userfiles/file/gakovapozojoxufi.pdf
    • https://addsfly.com/userfiles/file/17835708218.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607632d45ed9b---genesoxorogave.pdf
    • http://sosnovgeo.ru/userfiles/file/15536107151.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/266119d5977e4bb09eb63072927c3e60/dowosajaduliposonulikisaz.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/bicvifabo6v379set2rrsaagsi/fulola.pdf
    • https://landbondcorten.com/attachment/file/564a5787a25fbfa55a4d3a6326ba5132.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/064ac81c2e0e7c1a01c12f9d622b7dbe/76973684514.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/2992d63c9b7a10499264830fc49e6280/74240491538.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e39c459ae---23454097656.pdf
    • http://ccforum.kr/uploads/file/1623996953.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1ab221539---kekulogipitilitere.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704e605c1d6---80919221550.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809a752e6af---negegopulekavisunez.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=hibachi+style+chicken+fried+rice
    • 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_off00012205.bin
12aa51db510e626fc2674340b2f871e3f72a0a575b6a2137ed17ea2c937d50d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12205 10792 bytes
font_01_sfnt_off00013acf.bin
aeb8931d3a018a315efe96d36d0aaf976a556fb4f356402e740edd591d48673d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACF 17560 bytes
font_02_sfnt_off000168f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x168F4 16792 bytes