Malicious PDF — malware analysis report

Static analysis result for SHA-256 38273726c01cd319…

MALICIOUS

PDF

80.1 KB Created: 2021-09-06 15:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 25c6adb6a07f964233ef25fbfe8752f7 SHA-1: 91379eb96adb163fcfadc6b3f496a6d61ac0f9c7 SHA-256: 38273726c01cd319e79d659c65c3c39bdef6a167cb02b39a75cf1dde38ae7cc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external websites, some hosted on compromised CMS platforms. The presence of many distinct hosts and UTM parameters suggests a phishing or malware distribution campaign.

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 http://www.hangmandigital.com/files/file/13524722795.pdf In PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16110658f194de---24992339466.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13f80fd73---resotibad.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210820083332550.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/n38ee4oorrqslj2aml3fcjmrak/kewukajefebofubilij.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/tgmh9ocp30gcqg5u6tcblnajs5/vitujowave.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/mavikimedixo.pdfIn PDF document text
    • http://ametansk.ru/uploads2/30939756182.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/29968595338.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/tikujekoratuvol.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021052017150573499.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0e1bc791f---dunirugumozovuvonibulet.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/devinoxuxezevotunexotif.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087153366846---8450189002.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/13272351267.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/91028928260.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee62823d88---423619463.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/a0346435d772d6f0cf5bea3b42df5a9e/57629564271.pdfIn PDF document text
    • http://funperm.ru/content/file/29388052911.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/mozepegokikejine.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/bapulisanunerojufileta.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/dosigefidal.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/unazudoveduxivedomo.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7145414865---14712402305.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/69195611057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=foxit+reader+merge+multiple+pdfPDF 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_off0000d3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 17928 bytes
SHA-256: a2adddaa98ae35627dc2e8c319f83c70e309015539f8035dc3840d0045f93406
font_02_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 10748 bytes
SHA-256: 3390a690167a5f51238023c1c23d36d0c70b0b20f8b7fba857c2ff5347ff1d14

Open this report in the interactive analyzer, or submit your own file for analysis.