Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fe144459e7f9a3…

MALICIOUS

PDF

76.0 KB Created: 2021-09-07 16:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 144335fb7e1003555494bb23abe041c0 SHA-1: 60bb6bcb54f503df71c474bb2e103f00b9016f4b SHA-256: 16fe144459e7f9a3ecd17c426502e594f5479514f83c07a6f18bcba7e6c784cc
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure, masquerading as a songbook. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URIs, including one pointing to a raw IP address, further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/6557aecfcead511801fa35a167c97ddf/posogubulilefofawajunif.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b186be60915---xitaderev.pdfPDF link annotation
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608662a17e896---fakanuwizujulaxizijokoraz.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160875274d7a86---zeramagibuwimi.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/mofibo.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/zarunolubimaxudifewamuxe.pdfIn PDF document text
    • http://nensi.si/upload/file/liturun.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/jixujepaz.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/78147119790.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/11816571678.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/puzoxedometokiluludapofu.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/a428a4c7c504db37d42890670f09054c/80228938278.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6e16ffc6---poxexugolowaz.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/lawunaluxoki.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbfb3576fc---40607995939.pdfIn PDF document text
    • http://unsersohn.ch/images/file/xoveboliku.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/favixuraradifilijur.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/nuxar.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/19013076263.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/eb050c99a57dac278cdedb3541ec7942/34417912661.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/ruxavopapijudozewus.pdfIn PDF document text
    • http://primaneighbors.com/userimages/diposujirumekox.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/49947609285.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210612073258297.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/35v95ljkf88sjgvl14938heoar/josagaponexobigudozar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=songbook+easy+piano+pdfPDF 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_off0000e402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 17484 bytes
SHA-256: ccfa3ef0a20395b1f4041fb803b63fa29442a5a9d9a13e46fbaa444883fdd10c
font_01_sfnt_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1