Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d5e5b6c6f2335f…

MALICIOUS

PDF

88.7 KB Created: 2021-08-12 19:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f75392d26fc0b144de12395e35e0e703 SHA-1: 695847c4e6c21d2a134248d03ad5a68a2c85f6f8 SHA-256: f9d5e5b6c6f2335fad31045c89fcc42324adb4e52f1c498388e32ced6b9d02c2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests a phishing or trojanized document. The presence of embedded URLs and the heuristic 'PDF_RANDOM_URL_LINK' indicate that the document is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4457

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ketchas.ru/uplcv?utm_term=driver+de+video+para+windows+xp+32+bits+universal PDF link annotation
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/f98d9926cf08b421ce6d9165b9b96b5f/lotedidefolasumomojodasoz.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/5530656214.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160f8682ea3358---61176435845.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/v0rmh7jsm8ciqu7gs0af0d5qca/95490025072.pdfIn PDF document text
    • https://bloc-immo.com/images/pojuwisetirej.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/nomalowonawedufusolunaviz.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/df0s0epplobinl955p6l1f8bv1/zuwozubuvedevalutago.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xoxokedo.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/12998059213.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a5b2c4114---togoletov.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/zodafokegobodu.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/6c00d1c41e834e057ddf63015bb0bea5/30657313800.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/pewosixomuzupilijas.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b03833f6b---famisuvo.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/75285046143.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7db45c1e69---20660797852.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b118d902b---regukunulufitizeragofatig.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/varilefebinapoje.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d576b58ff7---63875213074.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bac69a737---gagowututimexakapaz.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a65eecb189---dutove.pdfIn PDF document text
    • http://ahchala.com/img/file/ruvefiw.pdfIn 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_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 2396 bytes
SHA-256: 17db696f83ec95641cba5fa10a8fd6e08038eaa8d2f5698b9609e734b8a0225b
font_01_sfnt_off00010573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 18976 bytes
SHA-256: 48f02b4f431f0e6a6e661c80f55f4a214577eea0e4df6960d7a25c3814e440bd

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