Malicious PDF — malware analysis report

Static analysis result for SHA-256 144d0077a8636c61…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 21:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1456e05476a0375321278435464d5efe SHA-1: 334f8850e0e07c4dfd17d412acc78a3ac33e0916 SHA-256: 144d0077a8636c61ec068992c39588bfcef02ccf0d033fa83f0c2e9b7910348b
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple URLs pointing to compromised CMS uploads, forming a link farm designed to obscure the ultimate destination. The presence of these link farms and the overall structure suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160763c31be8f0---80328920570.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a352989f3c7---bopelefokabawasew.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/fenedomabipo.pdf
    • https://rmp-familienanzeigen.de/cms/files/lukofejuzotojak.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c970473f96e---noremulivebu.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cnvd1tjb3bhaou70atur0u1tdr/xorotifefudufavij.pdf
    • https://beytarimcilik.com/admin/editor_resim/file/37387351420.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/35d47f8dbea6f8cc851877d70018eab0/gibelepixab.pdf
    • http://beloezoloto.ru/userfiles/file/18585167281.pdf
    • https://paklya.su/design/img/upload/file/sazurukazijagelowazuweget.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b35474b8---6923921204.pdf
    • http://casinodanmarkjackpot.dk/userfiles/file/17608639737.pdf
    • http://anatolianlgs.com/userfiles/file/94766891066.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/6816ef4d751a339a31e5badb17c36d42/vumaxokesamafoseke.pdf
    • http://niengrangchuyensau.com/upload/contentFile/file/31777585686.pdf
    • http://elisa5888.com/shopadmin/upload/files/vujukabi.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c75b85b20de---lixakuka.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9acd4d8132f79008c8f472d5a8a5d1d0/60877696313.pdf
    • https://karinbentum.nl/uploads/file/8216958400.pdf
    • http://sjhrz.com/images/upload/File/kuvebaninenubowut.pdf
    • http://primebrokeragetx.com/ckfinder/userfiles/files/65224082621.pdf
    • http://giga.sk/storage/file/80675449686.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7cc838b7e---gobosokinama.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/ffabf91b1bfcaa7ebe792562e8a795b3/89383744124.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+install+mcworld+in+minecraft+pe
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1a.bin
141a4e5ed43f6fdad6408f38daef1be031321809708917e9912e1c8f9f7b2154
pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 10860 bytes
font_01_sfnt_off00010631.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 16792 bytes
font_02_sfnt_off00011e43.bin
96bbb5e1918d3f88f1b7b0aa31d8259cfa09a84b5bdce67f6e45423ec7ed8cc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 17428 bytes