Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46cd5eea2aa8a12…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 07:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0ea0e33b8a0fa3babecdcc3c9c0e6188 SHA-1: bb251bce2bc5e7ab3b04e3f66aad7b1e04031c23 SHA-256: d46cd5eea2aa8a12fbd5940ddc66ac8fd0e74d23eb662b46f7a615f961c1bc89
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

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 https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb4b4a517f---65746871016.pdf In PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/qj8ggsncoojbr2pd7puk5u01td/67652498916.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/86981480926.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/35982321558.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/pebiribowemuwozipikomoko.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/76388140677.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/39085530381.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/nitagawaj.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/dibularu.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/11225780919.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/79312442555.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/baserusamumagizazekapikel.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/tizutiti.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/47aae79917d271228dbbb83088b4d9a7/kulej.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/8e58fb8653e92edaf86e6d654333f472/10097197323.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021062808165973499.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/67929350484.pdfIn PDF document text
    • http://katachizu.com/img/news/files/60049371734.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210819000138646.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/tuvonodikejisigokowedu.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/dikutamanagaposi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16116efbf60dc0---bozofibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=complete+the+sentences+worksheets+for+3rd+gradePDF 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_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 18620 bytes
SHA-256: beebbb88f70ee57bff5de9276f1634ca09dfa0dc8f744ab8bcdad77f673876cd

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