Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f93ff7a9089bd99…

MALICIOUS

PDF

68.5 KB Created: 2021-06-10 07:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a76520989b7961c8795eaa56a8fa164e SHA-1: 59a5d51eabab4fb2b415b1e7f76b55ed1587cae7 SHA-256: 1f93ff7a9089bd99bf06e0ff007b95c93c9b2834397bcc0e93ed2a5be3a16847
154 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating it is likely a phishing or trojan distribution attempt. It contains numerous links to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious payloads. The document body, though heavily obfuscated, appears to be a lure for a game patch download, aligning with the phishing nature of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://queure.ru/uplcv?utm_term=pes+2020+patch+download+for+android PDF link annotation
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/63bee312062365b877ec4ce05dc44b7c/11884627340.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-6/20210606172304993996.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/9c11032258c2e6882ade14ceed2bd16e/kexezelowajelire.pdfIn PDF document text
    • https://senhewood.com/d/files/bejijikawod.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/70a752f6e6f30629e6991e7c50f84b42/fuvokut.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/bc0c0e27cf63372375a2c955ea74d996/88452857914.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a17bf1947---75360737002.pdfIn PDF document text
    • http://abnicum.com/files/file/79818017699.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/24ll5r5cnp41a6j5lm1cpja4n1/43551111247.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/9527da4d01a4a041b88a3df6b9f6b9ea/17316559383.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/1f3de278bd59ac6050004a4a04589b1f/91565927291.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4515789b11---67206982019.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/nenelomosigevig.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1337d1c0c8---86398645518.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/xugetuzezakujopax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 5612 bytes
SHA-256: 4d40010da51057bc1e660b8a2e09af1b78c4c59bf63d43c00b6e2a38faf9b38c

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