Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea1cec599f6f347…

MALICIOUS

PDF

86.6 KB Created: 2021-08-31 21:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 907b94dc135a4ec9e109b6e728c9190e SHA-1: 9dc463ea7aa0291a8eced1136a51833ac17811a2 SHA-256: 7ea1cec599f6f347907b7783d464c67612a965952d858d2a1a2858ecd896bc69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The presence of external URIs and link farms indicates a likely spearphishing attachment used to distribute malware or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/uplcv?utm_term=the+rise+of+skywalker+openload PDF link annotation
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b085131f28e---tiduviduxogulixuzosaxore.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608552a77260a---pugat.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae71a883c8c---81279957023.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/406qkc8sv8jhij5ie8nel2ft7c/renokipesotufode.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c94bd7da---88260034067.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/92157886501.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/02b75b16dba42db9a3c1fe2f04111818/kosetijujuxanisofete.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae6e3d4529---gidutokezevoxetimefagab.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/77573142478.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/54770404444.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b46cb5194---kixaku.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/gugakukivutid.pdfIn PDF document text
    • https://coluer.ir/documents/file/bivobav.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120cf58a57b7---4775689111.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37ad289317---zusovijibowugototakuj.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/sidosupaxudemiguji.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/129bd01461fe925faed3d87945a552fa/6194682059.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/bimopazofakujovukeda.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/kodepal.pdfIn PDF document text
    • https://t2sc.me/userfiles/nojifelonotiwusotelute.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/92442579987.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c89b0e80c---37123317009.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/11947623507.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/lonizusu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608251d674641---37349209860.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_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 10752 bytes
SHA-256: 89d018cd99462ce6426a63e136610c2dca4898260a22f6da0b1d1280aef7e544
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11598 20336 bytes
SHA-256: 57b19898d3e71e4ca221e6a8dafc6ab7178ac4f0d1534dddc14e95830638fbef

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