Malicious PDF — malware analysis report

Static analysis result for SHA-256 462a47a374ed16b3…

MALICIOUS

PDF

66.5 KB Created: 2021-09-26 15:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: feec32bf794d0e540c9db2096078a421 SHA-1: 49881096d0eb235a24dc20f556e1f74bdad4fc99 SHA-256: 462a47a374ed16b3c024cfdacfc68b80f06dda4735b21a113bc82db9d480fe4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URI findings and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8010

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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://catamma.ru/uplcv?utm_term=love+nikki+dress+up+apk PDF link annotation
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/kafoxunelovavosivu.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/netunapubevijid.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/zuzenuvezevolixujedevifid.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dda628bdce---felivamidotumirurawawanid.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/94531069008.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/lovenixixojinoserakutabi.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210925190457.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/wilegizabogekadevite.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e237a26a3---jamoraxokuvew.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/66671674844.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/57325703i4i5gpf52t9cjpoala/34941099130.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/14300187824.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/27292673168.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kejipupofomapumamexibov.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sirijelifasadovuvixupi.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/49500776297.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/tepomefinarilafaji.pdfIn PDF document text
    • https://msiutilities.net/documents/zevot.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/kodobezijapukigalewape.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/91516055641.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/wugutisunisutetelavav.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fd63adfbd---39381167534.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132394627597---90764284057.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/46651954994.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_off0000b427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB427 15016 bytes
SHA-256: aa20d38007dad4d05fddbdf95da5f972f3df7fb29716433467c3a4c187f3c714
font_01_sfnt_off0000d9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D6 10456 bytes
SHA-256: 06fd0f0b4029fd207517dcd69b36462628d1cedbcae80196103cfa6e24114a1c
font_02_sfnt_off0000f1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1