Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e09dae283c0b82…

MALICIOUS

PDF

80.8 KB Created: 2021-09-15 12:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5e95a80e09b0416d4ca4d8cb571ec6b SHA-1: 96d2df626efdad05cc320821ce7df7539a5f1560 SHA-256: 12e09dae283c0b82215f1beaad4d022d4efd7a68c7e744ebf1fd4cd80e967de6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://bhopalliteraturefestival.com/mpsdp/uploads/files/vukakogetidax.pdf In PDF document text
    • http://flexinform.com/hirlevel/file/47466155559.pdfIn PDF document text
    • http://chinalabware.es/d/files/46687958765.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/nanenanalunabofilateporer.pdfIn PDF document text
    • http://icr34.fr/icr/icr34.fr/www/files/files/40278068281.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b2618b2f506f13875b903528e4895c48/26076147620.pdfIn PDF document text
    • http://st03.it/userfiles/files/91884251220.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/45718204383.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/1918426208.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210910074659.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/degizeligelaputakuvifi.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/3613c76fa561bf05dc68d75041d97157/72029449675.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/60676817780.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/14833397975.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/ratox.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/nejupuje.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614086883aefb---32738524991.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/vejapibowuti.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7bd2c4257---83408006751.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/9201589984.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/43658286064.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/wajebew.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/16329863795.pdfIn PDF document text
    • https://kiptep.ru/file/97791522783.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=vsco+full+pack+iosPDF 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_off0000da26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA26 16936 bytes
SHA-256: 5177aa79dbdebf9d7049254f55a2cf904dae2d735132e3a8864b9330683a2902
font_01_sfnt_off00010671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E88 10200 bytes
SHA-256: ce9b3ad238e2816b4ecbf5daf78f3a8162db626f6ade9c08ae74268be117ecfe