Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f95af1e6d686ab…

MALICIOUS

PDF

80.1 KB Created: 2021-09-17 17:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d4387dcf3555d58636b73298fae5f73 SHA-1: 86b0d948d0e155296ef74e63d53db43b961214c3 SHA-256: 06f95af1e6d686ab12137866a385a57c2a4be29ba59c27a125ac8d43d33c01f2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://le-lemniscus-incandescent.fr/ckeditor/upload/files/xarebisobuzefelumulosit.pdf In PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/19890162517.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/gemeluwoxawuju.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/22064054299.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/78395926240.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/27490709725.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/90212118787.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a3334d49eb048c4375023321db5c601b/timerodaloluni.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/bezamiva.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/66540046871.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/zurutaxurute.pdfIn PDF document text
    • http://swhos.com/upload/files/8149702569.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210914081940_1151284210.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/53780749176.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/65727069604.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd248c5240---fatofadegumega.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/pabadufunuputoda.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/97668254833.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/58554001747.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/pitezero.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/lepilafavapop.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/21130555921.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/25206314541.pdfIn PDF document text
    • https://everestart.com/images/stories/file/41721308114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=saudagar+full+movie+1991+hd+1080p+free+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_off0000c896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC896 11556 bytes
SHA-256: 5e1146a1edfebfb65d5b4b1d775b24e01b1c60ffede26ea3c05f1c61a103b1c5
font_01_sfnt_off0000e3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 20524 bytes
SHA-256: 1844906638cec55bc4bb1188f76c397112f9570939e2e0bdb494b7d5f5386eb6