Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1d6cc169750c55…

MALICIOUS

PDF

118.1 KB Created: 2021-06-27 02:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92473dd7b365a446b434063da4310313 SHA-1: 7c80d8e54ba2b01429f521c01d6697d3cdee119a SHA-256: 9b1d6cc169750c55ca220135a4774c37ded71d7c8d67d0c85997f4a830976912
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, characteristic of link farms used to obscure malicious destinations. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates the document's purpose is to trick users into paying fees for non-existent prizes or parcels. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://caphegiabao.com/upload/fck/file/66322443583.pdf
    • http://banghetretruc.com/media/ftp/file/12367157382.pdf
    • http://morard-mcf.fr/data/Files/ranexanipaxukadalulilu.pdf
    • http://contextuae.com/resimler/files/pozujexuvupobaxojaravive.pdf
    • https://decoveinvestment.com/userfiles/file/18794368485.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/104db0dbb86dbaa316e62be048c9048c/24485001624.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789544df254---vijosu.pdf
    • https://hohsingfiber.com/ufiles/files/xobojupaledig.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c41b2947f---79577418575.pdf
    • https://advantagelic.com/singhania/downloads/file/wusotedabitapopugale.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ead438b9b4---sitat.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8de634dbe---10947059271.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/2eba3b27f5d30447ebcf832e92375666/20966481890.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/0gd1nu2v90q11bkl2bj9gknn9m/56073934286.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4f98c4c1---38344670076.pdf
    • https://art4you.sk/editor_uploads/system/files/jimalaneg.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/bsgv9v6ujv6jqkqufqru5svovs/xijerifugo.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d0e41e3b---10792808563.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/4c43888142b0199356557a4e21e2f432/robubokiwujubigek.pdf
    • http://dichvutheapec.com/upload/FCK/file/jupotu.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c81248b1a---9325420404.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/fffd83f6e7c8a6de0b6f2b5d12035520/35438598459.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/sb2p3e9kd8p3jaul5quaivo705/83644183324.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=strategic+planning+goals+and+objectives+examples
    • 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_off00016a94.bin
9b20f83f5617d6428dd40eab229822644c11f358bbdbc95f4c786d8a9b39b8c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A94 16884 bytes
font_01_sfnt_off0001968b.bin
92b6ab80f0023369e8701548fd96d09344c4deaa74c5d62d02aa1716864f3636
pdf-font-stream PDF embedded font (sfnt) at offset 0x1968B 11368 bytes
font_02_sfnt_off0001b0d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0D5 16792 bytes