Malicious PDF — malware analysis report

Static analysis result for SHA-256 090322e618b35fdd…

MALICIOUS

PDF

77.0 KB Created: 2021-09-23 14:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 095cf96db8f8d2fa2b87cab029f074fb SHA-1: c4dce0ad58b9f37da1872dafafc99c7f303f3623 SHA-256: 090322e618b35fdd783a1949cd847ed4d2f65a21fd1b778eaa74b1081803dffe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using many distinct hosts with few links per host, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://myagreement.com/UserFiles/file/67622621172.pdf In PDF document text
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/97150537416.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/26704500343.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/jumudililaza.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614892521604e---nuzedibanetusinavigirogam.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/76597993745.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/lufisutenuwawizosefevema.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/xixanozimozexukumadifu.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/zavuxavagarinibexufasukor.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/vebapaxavebugapadowen.pdfIn PDF document text
    • http://vejwun.cz/images/vuxunujom.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/27343830422.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/sotuwirodoxuvewizuviwo.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/nijovapufurabifupudanip.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/sokorezebajebuzizejaga.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/nipusopumo.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/fulofitixovivivop.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210916_04C8201EDF59BCCB.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/749387193613dfccb5523c.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/jenomaluwesebogo.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/91184341602.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/wujamelalatudogusemon.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/sufimakar.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/liwabanofujeferoz.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/raridadamabisobojufosar.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/jevovek.pdfIn PDF document text
    • http://geyuping.com/geyuping/uploadfile/file/2021092311322973499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=android+router+applicationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000c8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 17344 bytes
SHA-256: 99ea5493bbc856bb4f2aaac2b156d361301f1a12c76839b99dc7d890f492bfc9
font_02_sfnt_off00010dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 10420 bytes
SHA-256: 1f3d358fa0102615f01d35fe6c027f9869b73cdab5f1781af26b634ac4aa15f6