Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e2943b0e39f227…

MALICIOUS

PDF

63.7 KB Created: 2021-09-02 13:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 56918dfd3eec58d8649689b46b5d0d19 SHA-1: e7d91e2a881fead2a5f9c9a08aa06e325325f2fc SHA-256: 12e2943b0e39f227597301dde6e31bf71288b8a6aff4f58d3357031449bf7695
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9140

Heuristics 5

  • 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 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://coretry.ru/uplcv?utm_term=high+carb+food+list+pdf PDF link annotation
    • http://vds-construct.pl/userfiles/file/fibijifupujanuxik.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7348d73069---jirozowupujifokuj.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609884f39f4e4---toguzovibolosuxav.pdfIn PDF document text
    • http://jonme.net/ckupload/files/tezadorovufile.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/33r635bkh5a248e9i9v8nmt894/vowusegekufiniranofeg.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/78297638058.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/10829285702.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce8074026---2617982608.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/eef030bf636a51003bb6dec9ce126c22/kepafukuverapeko.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/22699296322.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6636e69d6b---85929001643.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842f86c3d55---zofitekenumewajakek.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/tazepopugalodinexe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3f8af60d0c---72455244259.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/31642337049.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606fadf8cc7b9---zelusatemiwuwimebej.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/48376400001.pdfIn PDF document text
    • http://tayles.com/uploaded/24595449182.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffdbe08e1c---56311315593.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/4cc422ce35b5e27742826643313ef728/josewivufu.pdfIn PDF document text
    • https://industriameccanica.it/file/wukajemexiratufonawavuj.pdfIn PDF document text
    • http://ramz-alqassim.com/Files/files/74862509388.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/40953627353.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD405 17552 bytes
SHA-256: c65ca881acdd8958696eae9a166dde89b09c96030d43f497c79d24f621720673

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