Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9a2eaa519c1b63…

MALICIOUS

PDF

84.8 KB Created: 2021-09-03 04:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5d937ab00c6c2d8581abda490bd1b2bb SHA-1: 6838ec24740f6c0ce5ee1e4d7c3527f67b88f9fb SHA-256: 2e9a2eaa519c1b632c8d01bcc65cac5611de777753d4e1af797644f7e867cc5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. It contains numerous embedded URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=eurolite+dmx+move+bigfoot+foot+controller+192+manual PDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/03db4682c2adfc949f3df09ecfad0003/34659954557.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/31898674631.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/oed1iq0k9obffkvte5d1ooedmn/84068969071.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606fed3ebf0a4---85657777066.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/7aqbs9lmmtqleva5312hrti7gr/34760527350.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2647476aad---ripimi.pdfIn PDF document text
    • http://sergey-yushkov.com/pict/file/12580223477.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/49626513591.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/38948805183.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/95355920929.pdfIn PDF document text
    • http://ux-school.ru/files/files/xitinufosekubadupabasi.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/janerumibapoz.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/c429b4bd4747517241d094c45102bcfb/tazuso.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/q7cvei943nt6gijtlh57ujc49v/11651742068.pdfIn PDF document text
    • http://dr-temt.ru/images/file/wazipanavon.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/30503839444.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a7go7fshstb407h1enq4lsmpj2/24079422809.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/49204028133.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/4517ab2e06441d19545d7d1bd4d25219/zutupunavumakagimifato.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/9e53ab5df4bd694a93fb06352b7c226e/sideduwafurufinirivufi.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161127b9b625fb---59042619128.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae26374e7d8---buxenoveveximirazumenoxa.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/38170656082.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/sovopisu.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_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 18232 bytes
SHA-256: 02bc0b6c14c44fd2b3bf1d0c58bf523e85dd9b831de2573dd8d5b0312726a647
font_01_sfnt_off000110a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BA 11380 bytes
SHA-256: 5df0891067e30a3e0f837a47f1bbccd851918202072218e377ee28e7370b35e1