Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed77df41c9ede27a…

MALICIOUS

PDF

59.1 KB Created: 2021-10-15 22:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6245d2065c2f63b7ac155ccd26714f5e SHA-1: 5014939b3f05c5554af5cf9f08f220fb195d6188 SHA-256: ed77df41c9ede27a2cbe4218b5f09edd66ead80aea1d8413e2f7c4ae3feefed1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6992

Heuristics 4

  • 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
  • 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://myapartment.de/web/editor/files/36024345415.pdf In PDF document text
    • http://reckdance.pl/userfiles/file/zakem.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c9a4396904ed1a4b4d3c16a52c0abfae/91724909370.pdfIn PDF document text
    • http://landpas.pl/upload/file/pudazikeg.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/wabopawuponuzofivit.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/nolokagerosojigo.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/78684738606.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/85613758094.pdfIn PDF document text
    • http://taigesw.com/upload/files/rejupojokimuwag.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/jukozazopakid.pdfIn PDF document text
    • http://decaiyun.com/upload/file/21092203335911705032g35g2p96l4.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/lusoropelujalupiva.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/keser.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/jupodamasivifagip.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/besosagerojavef.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/purolamuf.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/1469695357.pdfIn PDF document text
    • https://togeltop.net/contents/files/88906246226.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109011723361444.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/xulatagejazarogurunovisi.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/78131267826.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20211003185156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/5bhJmFgkeCE/uplcv?utm_term=superhuman+the+invisible+made+visiblePDF 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_off0000bbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC4 10920 bytes
SHA-256: 39b6829e9d787b639167b3bf82db291ad6c9f995d852e2a96b2d6a973d320d14
font_01_sfnt_off0000d4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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