Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eaa161b3b6e3155…

MALICIOUS

PDF

70.2 KB Created: 2021-08-23 13:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4978b4f5dfb0552cb37deae83d54a2d8 SHA-1: 49f4d8fb2fb84c73d640d287df3f2d5bbb78b03e SHA-256: 6eaa161b3b6e3155b338636f29b80ffaa5c9ffdc757328f2189544e867801904
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, which are likely intended to lure users to malicious destinations. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

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
  • 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
  • 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://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/eg147pt0rocortsevbfim4l0q0/82370066107.pdf In PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dde4fe382fc---bomegobonosa.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/pujipexep.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/44640590334.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/fiwidawudizis.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4430dea0b---runitivezewipa.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/73604201479.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/kegizadux.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/55581090765.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/28945470831.pdfIn PDF document text
    • http://teresachild.com/upload/files/59849528997.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/jabuvabeperesozamulutes.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/92484860161.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/33235589599.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/jagomali.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/ka91pkg8360kkm6bh18379qqs8/18229383363.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9e1528e84585bd9f750d24bcfb480b86/netidejutizawelafo.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/katejoruxerex.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abdff955d20---wuwetekegixefus.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161200e9d9c6c7---lakuwikize.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/37999562931.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dc3c72686---rurom.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/sawuka.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/xekibonatuletibar.pdfIn PDF document text
    • https://phr4u.com/files/53204057878.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=baka+not+nice+live+up+to+my+name+mp3+downloadPDF 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_off0000bfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA5 11092 bytes
SHA-256: b6b3e7d94d1666ec53dc3b30a94c3d065620f43a7fa5c6365446d9faabb0e365
font_01_sfnt_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 17084 bytes
SHA-256: da921aad41b70e5120c14db1a96bd97f55efd1cb7d8aac9d6120bc4d7913dbe3

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