Malicious PDF — malware analysis report

Static analysis result for SHA-256 02faa3ad685ed7f4…

MALICIOUS

PDF

76.0 KB Created: 2021-09-19 00:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 9fe918a13034078681d9d5afbd4fe137 SHA-1: 5f1cfad2a76ac9b5394d12054694a0950e2f1a90 SHA-256: 02faa3ad685ed7f430247e203e2ffb653140782d93a752f2d8e9389064464526
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5364

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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://allytemp.ru/uplcv?utm_term=step+up+all+in+2014+watch+online PDF link annotation
    • https://waxparadise.pl/userfiles/file/89640028114.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/91021573045.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/pixijosozezuboguge.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/xogubuwusigazazomes.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/13202727155.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/tinakobuzesuxelaramib.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/37040405755.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210914_79D7DB4E174C8580.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210902130430_eul9kv.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/64771747832.pdfIn PDF document text
    • http://zerosquareonline.com/file/98452283122.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/83953400367.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/79436764184.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/12922714093.pdfIn PDF document text
    • https://olivermilk.com/tctt/sites/aaa/file/vavoluvosuxotitawij.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/tumabegexuwupolalit.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/41078724278.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/949730720.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/lorekabenubiveputoritul.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/tumelibolowor.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/88008549923.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140910d91d86---samujufasidak.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/romawumapolax.pdfIn 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_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 10836 bytes
SHA-256: 8e5b80427598b400bc4f75d8e516288a7cec9b76db5bcb1c345dafb6c341b682
font_02_sfnt_off000107bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 18020 bytes
SHA-256: db1d3b8eb83e1ecfc7ba5420285bf5524e688ab7068b966b902d9842c4b72806

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