Malicious PDF — malware analysis report

Static analysis result for SHA-256 e062d3b2f88f41e2…

MALICIOUS

PDF

90.9 KB Created: 2021-08-08 07:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 382a5499e093782d34b59939f21039a0 SHA-1: ac5a6503b4ba1b91546a8f14c44d0908c4d508cb SHA-256: e062d3b2f88f41e2eca176beade62a0a25417c3a97e66273cc301ee585dc58e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://smidgel.ru/uplcv?utm_term=one+minute+cure+pdf+free+download PDF link annotation
    • http://akicgiyim.com/userfiles/file/pinigebezuzamapejaxevof.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789382e53e3---muzokebutofirenisipad.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/menum.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/22684325904.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/55801799163.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/809e146e5a292ab9c6bfe306dc720bbc/26534348943.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a799c43876c---xunetajanexukigatida.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/suwojuwuwodat.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210625_FCB84E565CF23913.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/fetibebodavawupotife.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/53006992647.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/28878423178.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/zineve.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bad3503ea---rimijekepewajosef.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/zibofe.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60775083c7---45186425196.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/jusokuzo.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ea26702ddb83749591ea7f1555f18494/23629291423.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/7l0up3f29h63ur3qanibouirv1/21086294001.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/bazavenururita.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3ed627615---bafonukejukoxe.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/eaad84dcb459e988d7360401260a28cb/xegopokiwuxidud.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/givupovajowugisuzama.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 17752 bytes
SHA-256: d012bd5c06d5be67d1f34e3702e8a87053a687b76ff5399ab3fd92a3d421f494
font_02_sfnt_off000144e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E5 10824 bytes
SHA-256: f93693980024173464b6fdbf7cee77a66d168e30451574c8ece636251d767a7c

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