Malicious PDF — malware analysis report

Static analysis result for SHA-256 0077e58167101f90…

MALICIOUS

PDF

73.7 KB Created: 2021-09-15 06:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 95732a129d4b21f862430bc78297b242 SHA-1: d2fa09dc88178dee8ee16b51527f55cbb3dcf970 SHA-256: 0077e58167101f903e33f4d2a213e967353cec637be5ca3bf05fc8c4c3ac49c4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bpabv.nl/uploadfiles/file/43941237519.pdf In PDF document text
    • http://edv-denk.com/userfiles/file/24313479960.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4a927ad811d64d75a2fa6623f84b4301/41394167678.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/87286650087.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/48058515358.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/tipugasepegivowewariw.pdfIn PDF document text
    • https://anakmeong.com/contents/files/62408834738.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b967a058af---sixalisovilelusukapo.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/40286219213.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/68890064344.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///51134845821.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/7005484250.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/janojepirov.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/1261353518.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/suvawuv.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/95768178978.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/55317918845.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/44578678968.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/7287137489.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/vurunexebujigileb.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/dalidozununopewol.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/panunejep.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/aa3caad6060011eac6b6b2d2b8b951c0/32754767959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=imo+beta+2019+downloadPDF 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_off0000bf1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1E 16360 bytes
SHA-256: 74112bc4c1f36f3e4705993c980769db4ae59a8fdb6711dda0230176774a7893
font_01_sfnt_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 10688 bytes
SHA-256: 3f2f1e21c1729f340dacf597231f876c572937289bedfdf092370e8db3204fbf
font_02_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1