Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e63f26137bf1f0…

MALICIOUS

PDF

92.7 KB Created: 2021-07-08 17:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c1d106628f23374f993ea6cdb1e40e03 SHA-1: 25c8ea99ab4c81b865a86c05e015b30249dfcd64 SHA-256: 58e63f26137bf1f09c247fb3f423aa4de51a93f4816af2cff89e91b1b10f57c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous links to compromised websites, including WordPress uploads, suggesting a phishing or malware distribution lure. The PDF structure and embedded links indicate it's designed to redirect users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/4166036a0658f536a823a4be4608f6d5/jujedido.pdf In PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078b66ecb770---74776045000.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/4b96605e84a7d49abd3ce3228e324d85/41438024073.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/61241554923.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/2f8354d69692081e1a2a4989edc9e7ab/75467113672.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/25789358033.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/zorojegetolamaditobu.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/79767495709.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/n0775vvctj0g35bq4pnmtil2ck/57356401656.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a7edf39951324f174de75215a939f59b/72910505345.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/lis5sqna8ue91g3dkstov74mg9/xejotibigugobituketat.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/40266cd8b3173ecb432096e9cf788fc5/24434833392.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fab26d84e4---gagutowoj.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/94465553069.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/98pussjn08udp4j4clod8e1mr3/lijolunididerogotesori.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/983592e1d1023880b6e304c6659c29c5/peketaga.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/15275090c8d4c37eda61c63c735d552b/fonolozedukuvifazufu.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/23118660369.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160978a082cec4---zolumotabibil.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79cb806e9---vefozagasoxutigej.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/busobim.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/wakog.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed929137d0---66795316342.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/27578331221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=meaning+of+recentmentPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001139a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1139A 19132 bytes
SHA-256: a6236910cb8be4a6ceddf93a88cfab9a7582613cf6da020d4a83942d61793393
font_00_sfnt_off0000e3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 10460 bytes
SHA-256: 627ec8c9d3f4310eefc088ae9af417d1dc5be3497a06396a673048e675178c40
font_03_sfnt_off000132b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B5 19804 bytes
SHA-256: 03039151b249ba76d7632157927c4610adc5421e8c2a6032376e07df7f7a7883

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