Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f060d0fccd7bdf…

MALICIOUS

PDF

68.1 KB Created: 2021-09-26 01:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6a5aa1e71cae16fb33c7c36e914772ce SHA-1: 425835c179e6ba717f872aa15da2a426249fd814 SHA-256: 40f060d0fccd7bdff2b846bb767e7cced468f5d536d4e593cbdf34cdb6d0b5de
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers also flagged it as malicious. It contains numerous embedded URLs, many of which point to suspicious PDF files on various domains, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for multiple links, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6949

Heuristics 4

  • 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.
  • 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://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/u74ta5qa7fca63q7g3qvqm8791/defozaras.pdf In PDF document text
    • http://schokobrunnen.com/idata/zidototo.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/9178185622.pdfIn PDF document text
    • https://hobbypet.cz/files/file/mobemojewazapikilorazef.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210901091335.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/pasuruputilomopubesupuz.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/74960462584.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210924120058941559.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18928867672.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/jodikesuvajuwanigizi.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/zolakipiwinixewu.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/watinupopefilufedokugadav.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/58321127796.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/belaguwomipojuxadiz.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021091107501773499.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/kibifiwiwol.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/14416782659.pdfIn PDF document text
    • http://xn--c1aejbdnke.xn--p1ai/admin/ckfinder/userfiles/files/juxajibelevipenodep.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/wutiwifobuzatu.pdfIn PDF document text
    • https://pyccenter.com/images/Upload/file/wuripetuparolemulamok.pdfIn PDF document text
    • http://webbuilders.com/files/file/kidoxifijinufilironupin.pdfIn PDF document text
    • https://maturana.cl/upload/file/82880318530.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/1567154480.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/2e13b119df4e6619a05ea2890df57840/guxakamasisojad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=chronicles+of+a+death+foretold+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC390 10748 bytes
SHA-256: 38f711c341a16dd067189782db6ec41e5e26e24085383ac3d8bfd8aa1744973b
font_01_sfnt_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 19952 bytes
SHA-256: 6010c555bfdeca770111d83a8c40dced0decb8509573fa0214927db455b8001e