Malicious PDF — malware analysis report

Static analysis result for SHA-256 582a27a791fc6d61…

MALICIOUS

PDF

66.6 KB Created: 2021-09-23 23:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d08be8f8eee5697ad7e5bf74221793c6 SHA-1: 8777e2d257a0c7dab7037eb2d2e787cdb14ba155 SHA-256: 582a27a791fc6d618c206628cd82745e94aeb691621a221244fc6cfdcfd2b873
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

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://krisoc.ru/uplcv?utm_term=landscape+and+garden+maintenance+near+me PDF link annotation
    • https://ppsu.cz/files/file/lubepemizunesekimasiva.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/pibibijuxedosemetudipom.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/rawonobelen.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/likovute.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/nixidopod.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/25142439864.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/fekufo.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/3390853875.pdfIn PDF document text
    • http://air-con.ru/upload/files/pukugo.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/87731258410.pdfIn PDF document text
    • https://tessuno.com/upload/files/614ad42d28b91.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/92351251674.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/60834443996.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c30342f6c2---72051565577.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/revobon.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/ruwejilowurovironuxa.pdfIn PDF document text
    • https://dacola.com/upload/files/35232782627.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/nizazedopisoba.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/83510996353.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/pupulugoxumotuvaji.pdfIn PDF document text
    • http://yejida.com/userfiles/file/26521779295.pdfIn PDF document text
    • https://olterus.org/contents/files/77765833575.pdfIn PDF document text
    • http://envigest.cz/upload/file/39838704509.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/tuvofuxigebowirasi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56E 10648 bytes
SHA-256: e19f07f0942bc8ef61bbe8fd4a583ee0c237bf66c4e0eb74a1e80af1d0d2c699

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