Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b22d0162a89e4e…

MALICIOUS

PDF

70.9 KB Created: 2021-09-07 22:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5e1c9b342eb2575f5045e49a09154b4f SHA-1: 1729665b746c333da9a469c4924321159040ad39 SHA-256: 16b22d0162a89e4e8e4912c798930902e9f85bb1a6cd3435472f69aebc36ed4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites and disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The file's structure suggests it's designed to lure users into clicking links that likely lead to malicious content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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://crewmak.ru/uplcv?utm_term=consumer+research+definition+pdf PDF link annotation
    • https://hoavily.com/uploads/files/degif.pdfIn PDF document text
    • https://themalc.org/files/file/gibirapemose.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/41a8713543ebd4fb0b800f83b123afd4/zemezunesezotelofufazufap.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cd810fcdd---vuxakevewezeresulapalipal.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/43825495605.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161218882e6721---96789412078.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/kaxebapedaratepelif.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/88a4550762a5d223854426c48aca5b77/xedufonunufumuk.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/28055949000.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/39119172849.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/pomejuwibeneperix.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/58682027927.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4af72ebb3---94146672108.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/limesetikidesiw.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210719181037_7td8b1.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab8b6a489---berokigixelan.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/ddaca9df0b0d49c5061b80e5be6c1bd0/bodudusivisa.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/beweg.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/puwowozode.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940ac5087bf---fukenodamurotigepilul.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/18288475334.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/fapetusilowose.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/jafuvubovatox.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac405a2cf13---zewonarutuxidedi.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_off0000e74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 17072 bytes
SHA-256: 2912045444f5eebc0bf108cb2c64c70794b7a0d1eb182ff14a6cd4e9f200be43

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