Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead9632725dd5ac3…

MALICIOUS

PDF

86.5 KB Created: 2021-09-01 00:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 493fdd094c330a011d0f413a5e0cf0d7 SHA-1: 4d76c46eb72cd1f69f8437868cbdc19a7f5abe97 SHA-256: ead9632725dd5ac33d6dc43465b6eb0f38fe16f7f8859fa17d9bcfe4f07836ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of these links strongly suggests an attempt to redirect users to malicious sites.

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 http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089685857428---safafabowefapudapofepila.pdf In PDF document text
    • https://dailyhondaotomientay.com/upload/files/31593432622.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf712c06263---jiwigokiporoxikoxajet.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/ca701db77e47dfa85d00d18f0f948a19/nepafegobe.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/jidajeravijonako.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/9a8bcaff232c7630524762153aa6717e/voxekiguzodaxosofid.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/63855460292.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/98002716764.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b83088acc---gafajonurigagub.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65604068cf---furome.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/37327440374.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/lorisid.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/13537792014.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160d61ff6247a6---gomet.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3oqet01ahvlcmfe353e3faepcu/58486399615.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160720c9c71f7f---9951021495.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/6ojgg4g4pjno0llar8u26a4u9m/walavitor.pdfIn PDF document text
    • https://healthcareadvisorsgroup.com/wp-content/plugins/super-forms/uploads/php/files/2cbslq0oet2ltuaak4d00dgqg6/20881952545.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/7fdcfca4f8b82c628d335499f7f9b05c/84658206729.pdfIn PDF document text
    • https://inncredel.com/uploads/94957267095.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/98sjelh4t5e442vve25vo3s9f0/jolixamegerux.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/golu12ts3cps9v0j1801gsdsq6/lemekutajisixozanonasoma.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/povegudanupowurorijubakor.pdfIn PDF document text
    • http://ge-mak.com/files/menefosadexadobobokowi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b9543009---1230162963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=obb+real+racing+3PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 18896 bytes
SHA-256: 6c545095bac69630b914402959ed9624f1c4fcf05af8c40cf2d76c5c1949b001
font_02_sfnt_off0001349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 10356 bytes
SHA-256: 19acb67d79a149fc28fba00efb51c2e40fc22fa68e4399d32a5cd73302c905b3

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