Malicious PDF — malware analysis report

Static analysis result for SHA-256 449b2853df247d6e…

MALICIOUS

PDF

76.8 KB Created: 2021-07-31 13:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: de1ab414fca6c8d34c4e8176446b0335 SHA-1: 19c49684ba5ba35c7967372a6a32c9672cd63a43 SHA-256: 449b2853df247d6e39097bee5f12d5b05e9557e80caa75424f2ed6e68decb67e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5228

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
  • 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
  • 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://bellina.pl/userfiles/file/70707356859.pdf In PDF document text
    • https://embassyinvietnam.com/webroot/img/files/44106873222.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ojjs67go0ql7ogihscgdor8k3f/wudododazipeginenoj.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a6656422c---92160292420.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba795b51f---tovenemojotufob.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e88f6f4d72b---82563947805.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/57784439736.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/medelosepefi.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/q0fa26h99ns9493aq1nvv0r5ut/lefovaponapejinikofemoxed.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/mowawenijojamalefoxoba.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/fukifemem.pdfIn PDF document text
    • http://vhshf.de/File/jidazaboradirikefera.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/ninodufupata.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/botoxawadunez.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/25024150e5a748ef876696b03a1488bb/soxesuwenafororununo.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/ranefudixanubixukeradasu.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/46cab50ebb2ad703a7c26d75b00e1246/suzokas.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db523d80549---zewazeluvegopomenu.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/jqgtj32q70tl5b8mb3diu488f1/73656550918.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/27797138192.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/66015258980.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/kf5j53hds8gjq6utr9p3mk8gtf/zunonuruxekiten.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3f25b368f---kifedanoba.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ad8c8213543c398827b5e648d6a5d8f4/34804393186.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/xojenavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=bach+well+tempered+clavier+prelude+1+pdfPDF link annotation
    • 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_off0000d968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD968 17952 bytes
SHA-256: 8060bb8774931216815e7a903a2e2ebe8d1faf2db1d97cc9a296c696cc5d5d19
font_01_sfnt_off0001067f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 10848 bytes
SHA-256: 052d2d2f4238900506722443c7f416a103ae60d88c3e9c3be0e5eabebde92585
font_02_sfnt_off00011fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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