Malicious PDF — malware analysis report

Static analysis result for SHA-256 019167262c9ef72f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 08:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 395bbf8dd803a1829267d45ddcf365c7 SHA-1: d699b6396b602dd89a86eacd18167b65b31a3547 SHA-256: 019167262c9ef72f020a3d5a18ad52dc0c42bdeb3f490382d03c635e064f12a5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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=conducting+research+interviews+pdf PDF link annotation
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/eae48410eea235274fa68ca1a0ff258e/16667096355.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/54136083192.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/bavabusaxifukoj.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/11664311518.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/joziminuz.pdfIn PDF document text
    • https://noddy.nu/images/file/83623856958.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/40171412952.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967f44b236d---88882169983.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/82923174254.pdfIn PDF document text
    • http://lovesenergy.com/file/69800228491.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/39759192081.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/xagepuxagejaf.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701cd00684b---95654826457.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1519cfa46---sezuleputi.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/73369825859.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/f1d00fc1f13bb79aa028374a351fe1b0/kubakazitagosiserizib.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/k1s6c8143m41bqj4kengks3ms5/46605820260.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210712_EF2FC49D39075BF8.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/aa2d4578a86b7e984287f667553d0cbc/1674169673.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210816125310.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/jewezuje.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/46514638160.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160737fc0ac8f9---28144283892.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/pevamudageruweruzulolexas.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609743f6c89e3---vomoru.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/wimiziboge.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_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 11136 bytes
SHA-256: 2bb987f6abb5b9f300d7e46c98ccad580edfeaa44cd77e31142a103fda630c0d
font_01_sfnt_off0000f805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 17584 bytes
SHA-256: 312c5a6cfcccd07e22d3fe9138beb36798d77b125854a1173ed0815673889edd

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