Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b024489d7afb68…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 17:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c92d9073eebb5f47d6f2e79a8a2f2f2f SHA-1: 695c8ae3745e6191e5ecf922ba374da40f9de83c SHA-256: 80b024489d7afb68b6ede61d775803da47fa4a491fc3cecc7b2f696f65790210
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and other disposable hosting sites. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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.swx.global/wp-content/plugins/super-forms/uploads/php/files/199c5302ab9a89c9b8cf9433ffcd45ca/lareruxutedapowozatif.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6292f5409ee3f7133597988820bbd9bb/sidup.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17ff317707---30511429780.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084f6c93e8e8---livajov.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d035ee172---26053338323.pdf
    • https://cleanenergy.mn/uploads/files/livelekelekiv.pdf
    • http://www.gesas.it/media/mailinglist/file/fedepegusu.pdf
    • https://hitourkorea.com/FileData/ckfinder/files/20210617_015A0E24F236DAB4.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ffbed5c92---xirururixiresekalasen.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/600a3c77fba1ff33e4fac1e07d80cdd1/dolunasamovobupudel.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fec210e6c1625d6ae8b96cc72aacc935/65295657279.pdf
    • http://curry-box-deluxe.de/userfiles/file/14431331067.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/76a7fdaf5b7c87f7253e3139e7064d13/6779602907.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/c4ssihotm9sl63lnm8gkq7v8hr/84593739708.pdf
    • http://aelma.com/sites/default/userfiles/file/13046682683.pdf
    • http://younewstoday.com/task/userimages/file/sepunexuxorezo.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b25e0ac223b---vavefazot.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c54c06c5c69---36081981727.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0c6880885---31000697716.pdf
    • http://davidlbrooks.com/clients/868292/File/kodogavejawenanewerukew.pdf
    • https://tessuno.com/upload/files/60cffb6982557.pdf
    • http://baaningdoi.com/file_media/file_image/file/rowavadasizimidupu.pdf
    • https://paperland.bg/uploads/file/90353418263.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/crt2h0efau3t689rlaud1tmo9n/bonopavewaleza.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcb6b8a959---54549250034.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=green+bean+casserole+with+stuffing
    • 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_off0000ef0f.bin
2d652d88695add53f9a9bf62a1bcd8b969354f42b99aec84cfe98807534e1dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 10980 bytes
font_01_sfnt_off00010894.bin
ebc05734923574231c019e01fc49b947febddc9d3c957e72f97996211263a53e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10894 17616 bytes
font_02_sfnt_off00013699.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13699 16792 bytes

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