Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e86651573be6fa…

MALICIOUS

PDF

105.5 KB Created: 2021-06-25 23:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a711c5f6665cc89648b12e3d748be2b SHA-1: ed9867ec9710a55ebbc8ef3b478ff1b433a29d2d SHA-256: d1e86651573be6fa480b498ccd27285838690c1ab64f8054a16ab2f49ce4c72f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm, with numerous embedded URLs pointing to external sites. Several of these URLs are hosted on compromised WordPress installations, indicating a potential distribution or hosting mechanism for malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 5

  • 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://eko-inwest.eu/upload/file/tazigafib.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/5479b21e83f0372ae1325b562fe5cd8f/wider.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a34ee29ec290eed1578c45eddf690e83/savusunalatevavufebipebeb.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083084b510fc---romesuxusanulolabezovu.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea584312ca---9319761451.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/8350e169c1250d338429c155ecba68c9/fudesexejo.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/bd7b674af5f6b804f502fb93f6efb2e8/51632957658.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/14004b0c8ad576e8d13efa757cf146d8/38844825290.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7582d860c---13977613339.pdf
    • http://otoozevran.com/resimler/files/6509276777.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c675fd9f6d5---sonebimuvigetujadaril.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609201a4756c4---16182788581.pdf
    • https://gute-reise.ru/i/files/files/bepudurovafugafibu.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8cf24eb09---roxakoki.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16082690faf4e1---nujujumerodajot.pdf
    • http://aelma.com/sites/default/userfiles/file/pafuvifexadufokavewazozam.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16070ceb58bb15---renaf.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbf8784dd1---xarogozejikunufapogixig.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16072c68e7d837---tuxilazizetinasoro.pdf
    • https://bselink.com/userfiles/file/pidaluge.pdf
    • http://ascensionchina.com/userfiles/file/duvidamasosivo.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/tugozitusekojejow.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a30a2b6b4---wuwisafitopu.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160823872bf079---72394129440.pdf
    • http://tizianaiberti.it/userfiles/files/terovulidimileful.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=non+inverting+op+amp+vout
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012299.bin
68c7823e135b64ad922a2759c66ac1df80eff15100c346c66b16c6f709ab6074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12299 10524 bytes
font_01_sfnt_off00013a90.bin
fc957477e3397040f94da30bc5be63e085c51646d80411e031f970d1fc3dc2b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A90 16156 bytes
font_02_sfnt_off00015007.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15007 16792 bytes
font_03_sfnt_off00016819.bin
44fb95379e225237f947c32ab79de15212f82e462ae78d98a5fe6c170ae9fa3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16819 18040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.