Malicious PDF — malware analysis report

Static analysis result for SHA-256 03939faadd3907aa…

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 20:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c799047bd323160f229ebe9a84a0582f SHA-1: cc29529e406b5efec2d2ebec8493be6531a31e96 SHA-256: 03939faadd3907aaf104d97a747c8dc98e6c1749077837587d8e7c17174b528a
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites and exhibits characteristics of a link farm, suggesting it is designed to redirect users to malicious content or phishing sites. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://riskhedgetech.com/uploaded/file/1472742693609cb7331d40d.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7da5af19b371350e0f104169345a058f/zinopexenurigon.pdf
    • https://thehideawayresortpattaya.com/userfiles/files/19251374437.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ntkmdco37osd22b98bmjdknb57/28617227058.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bc70f4216---muxinibafudiwapum.pdf
    • http://iuf.kr/pds_down/files/nuxaruxolap.pdf
    • http://dichvu12h.net/userfiles/file/7127979963.pdf
    • https://ddshower.com/ckfinder/userfiles/files/97209967576.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ntl38mg4lobjbp5ml3r4ng9ip7/77171494070.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/c08c14e2b8512a3b430b85488de4e16b/62182923353.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc89bef7c3---2279942816.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a280ac96ae6---fixaxogaxazure.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702c9ae214---gedazagunasejalo.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/j0n4g70fa9omm05acur9pacf18/nelurutudamidupuvule.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/18927aa9f263349fc44c86b1a17c02a2/45445789298.pdf
    • http://sdds.be/userfiles/file/nanemepezivuletasadi.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d8d65639f480b2b6dea1dd284f421f58/pisafis.pdf
    • http://lbtech.kr/upfile/files/48724048628.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d214ac0c---tilizurelugijepup.pdf
    • http://opakowania-loga.pl/zdjecia/fotki/file/jevijidabosidusepoj.pdf
    • https://info-jimukyoku.jp/lot/upload/files/ridapopokezogawog.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a9f8191dd---nutirujefogas.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d8d6685a0c5---34497993709.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/7094c4219852612191dfcf31f9be601c/99473243469.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/v9ul9ll3rbmk3onbanfsesrvdc/viginumoforibikoferifu.pdf
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/75929738619.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/c7422a36a38913da431e86231216edca/dagusaw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=epf+joint+declaration+form+new+pdf+download
    • 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_off0000e9c7.bin
89ffc9aa6c6e11b5bcdf528f6ba39bc982f536282adb0c87c9039eb25b4fecb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 10812 bytes
font_01_sfnt_off000102ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 16792 bytes
font_02_sfnt_off00011abf.bin
36b91903f7e210448fd72117ca97c1e3bdf7f6cea0ea036911f236f7ddb1eb14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABF 17044 bytes

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