Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6eba94c5363e6d…

MALICIOUS

PDF

86.3 KB Created: 2021-09-07 21:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ec2819bb7bae4b5c870a596c54b9d9bc SHA-1: da930f20d4e4b7a8d005fb8fa1c1e30736e8c2d6 SHA-256: ce6eba94c5363e6d89099ec90249ebccb32e08dbbcdf453d0d7b6de8575ebe31
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various file conversion services, many of which are hosted on compromised or disposable domains. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password for it, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mudrkanuch.sk/editor_uploads/system/files/lirir.pdf In PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608270bc08077---92409755616.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/79341936218.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/sifemeti.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/78231450762.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/75932211527.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/76297283808.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079f8c1249ad---18015400422.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090404461470554.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/55667874863.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/66303388174.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160bceb7505507---45097294242.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/c4e91ce09a37099c4c6080dd2b715014/menixuzum.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/18818244897.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf9c1029bd---xoreri.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7va8u7u1ag7asrc5svhl2aktf0/lijifudevefefuwow.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///wigevomofijunelatev.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/56102968584.pdfIn PDF document text
    • http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/balebagirukodajawoj.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/nekopeferarebojolunedavi.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb8525ee2---topulasozogerezetudapa.pdfIn PDF document text
    • https://tipresentoio.it/images/file/figudewefibelidejamir.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/4bbfa54f48eb9bd8fee99782a4b6662e/86324131986.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210718_CE7551B0FFA09151.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/ba75be562eb4abc7d68eb45b0c644b00/21726707182.pdfIn PDF document text
    • http://swiss-ex.com/78839455696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=word+to+pdf+online+convertioPDF 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_off0000e8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F0 19320 bytes
SHA-256: f60531a1227eb8f0e49735b89749b5ca416e9371b26be7a0f4f3ac7eed606ff1
font_02_sfnt_off0001340a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340A 10340 bytes
SHA-256: b4bbba9f02b6587088b3d384f9c729165af506c6735b130009a61afd36b8bd6b