Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcc52ddc2c3339f…

MALICIOUS

PDF

61.1 KB Created: 2021-05-04 00:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 983e171e0df0a291566d79e4259bf6ef SHA-1: 78486a2410a7b7ee090a994fa1043c3a9f0a1451 SHA-256: 9fcc52ddc2c3339f1c8605a716828966405102f37160fe2e3de4048feca61f63
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to distribute malicious files or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to exploit users through deceptive content, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734bfbedea6---64551309239.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/e10d3605ca9073b55f3d2d78abcafa1d/tedoravanifoludimo.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160707e8419ba1---sunimomasopedofirefula.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e40798a6b---29222994224.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/o047ms06i2uct2b11k81m4mett/67241629147.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/fk521oo8lm1579s1odlik3r8fr/54062853446.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609070951108d---soferaregafepogupipo.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/vq0r2odsm74sbnh897juppfdmj/tuwajizalowabola.pdf
    • https://anfauglir.com/images/file/7131626463.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c5f42e8083c3f27c1d1bf5394a87e3d5/33100960718.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/0va4822lm69mtdm61athr0am3k/67407079409.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b0cb45714---7092857208.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/30a201b812615209ae632ac174574175/satobebaloza.pdf
    • http://apluskleaning.com/admin/images/file/26408434467.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/sumfb5ofd83s5e8buhpdqeprvo/51420113890.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b4b52d3f---safefad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=bollywood+new+2017+movie+audio+songs
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ae.bin
bc5790872a0242a91571341e36934f906e4980fc2702824a7bd59360ea04865a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 5756 bytes

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