Malicious PDF — malware analysis report

Static analysis result for SHA-256 5accf7b6cacbd5be…

MALICIOUS

PDF

118.0 KB Created: 2021-07-01 16:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af5aa038099ec74e55abda837321bb19 SHA-1: 87ef89a5108c67009f5d5fb2715d632f6358db70 SHA-256: 5accf7b6cacbd5bef2163e9711875ee23f429c5ee8da4dd59e5032a07f07bf71
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and a specific rule for advance-fee scams. It contains numerous links to external resources, many hosted on compromised CMS upload directories, suggesting it's part of a phishing or scam campaign. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the heuristics strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5ec4f35aa---rosajo.pdf
    • https://tort-art.ru/userfiles/file/mubatur.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/43205246047.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16f17f720---82931220093.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/19370259951.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a55a2682c97---putuwewowapuxulu.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9c9e16c739eb9eca39462e3d63f2dc96/mojivaparugoge.pdf
    • http://eros-arena-reutlingen.de/eros/userfiles/file/38246193718.pdf
    • http://caryhigh1987.com/clients/41333/File/jefomibi.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/2392e1b256ea2fce6ef76913a3d376b3/fomewigeselebosopajexu.pdf
    • http://phuocthuan.vn/images/pic/file/sonobiwavogameponebolesiw.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/fbc10c171b2fc778e35f024bd6566930/sogop.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca68eb577---tofapokovavemeza.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160886b5960e8e---fijigepozazud.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0038815f---bovusepawafetip.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a050c1371c0---papusupabobuguwasibanupix.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a47d7fbd0---22271507507.pdf
    • http://arohitourandtravels.com/userfiles/file/29157427599.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d2c3a4fd2---lamoga.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab802658cb0---31846928077.pdf
    • http://msinziniering.com/userfiles/file/29213659567.pdf
    • http://goldnumber.info/userfiles/file/21910702296.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4794664743---wimuranijuvamen.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/dac8dbce6127af3eed674a0275066bcd/ratanagidazajoxufawopa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=congratulations+message+for+new+business
    • 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_off00016bb2.bin
d3df45033c48855c1bd41873788a8e13a71c9cd6469ba91530148abac71ced94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BB2 16788 bytes
font_01_sfnt_off000196e8.bin
cb20ed87d585e7a1492236250f2605d4c739c6644c2bd1c7546ab83deaa3cde7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196E8 10916 bytes
font_02_sfnt_off0001b04d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B04D 16792 bytes

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