Malicious PDF — malware analysis report

Static analysis result for SHA-256 be05c1367aeb19dc…

MALICIOUS

PDF

80.4 KB Created: 2021-09-13 19:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: edfa38d59ae8a76f4a2b43b26acb9b4e SHA-1: 4116f8d50f7fa8360eeaf6a869dfae3a4804dee1 SHA-256: be05c1367aeb19dc73c64abaa503b652b39f14682aa9588545604bdc1d6027a3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm. This suggests the primary purpose is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

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://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eeb4aeb4cf---wovulomojiburumi.pdf In PDF document text
    • http://exms.fr/sites/default/files/file/josikujires.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/numeserulireli.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/nejenedagujitudedofuz.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/23202276161.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/lulopi.pdfIn PDF document text
    • https://isleo.com/i_photos/file/bitavuwewimejexobededaliv.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/batezoxazimotomiruzukawid.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210909_10588D5F0E3DCCC8.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/2torf2uufmb87uav4qf5eh8nv0/totemumowukidonafupoj.pdfIn PDF document text
    • http://kodemari.info/data/files/97602314084.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/79291531671.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/602114611.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/bibagiduvotev.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/vozikozagixisokunajij.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/22558155803.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/210590218061361c9cb5b66.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/muxurefetorupif.pdfIn PDF document text
    • http://zeci.nl/im/image/47510388181.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/30740515299.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/wajed.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/vavewo.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/46708368154.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/nufuwisogulaj.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/tiwewaludirozusiweb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=headshot+tool+for+free+firePDF 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_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 17872 bytes
SHA-256: 932b5ee885bfb1d601aa724001403001c515fb94e2721fba5b7a84d33789d371
font_01_sfnt_off0001187d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1