Malicious PDF — malware analysis report

Static analysis result for SHA-256 9372fcae73102650…

MALICIOUS

PDF

72.1 KB Created: 2021-08-19 20:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 151e65e06cd15fa11ebe7a59b7bb7f1b SHA-1: cad19a6d26004505ba72a4c268bcb79e377c0720 SHA-256: 9372fcae73102650ca0754ae3a93b0dff35b6bdbc3a46ec6921c2c4b768a0e59
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external sites. Some of these URLs are hosted on compromised CMS upload directories or disposable domains, indicating a likely intent to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4393

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://chcial.ru/uplcv?utm_term=why+were+there+14+books+removed+from+the+bible PDF link annotation
    • http://asupuro.com/upload/save_image/files/46205912257.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/18786861280.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/tilul.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/nuven.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/kitvfufbq1c5qoa51qq2pr9q84/fedetaru.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/8076cf6096b7d7d3399770b28f724293/74642594059.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/femutegimel.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609406e1dbcaf---26190091471.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/71867277538.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/20abb29b1656c3094ee2dc3e43f295f5/gurigoxiwanadeje.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/49595827708.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/bixaboputinurisegufopeza.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/51090586278.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/07/file/202107192015219399.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/wonelerixatikuwinegubopub.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/ribirewisujimevuremezexe.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/63440091293.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/varanaxiwixaxekulogugumu.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/211dd02e07b79871cac8a901de3e1c65/87025221219.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/gemosade.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/7befaf80a19674638086a750358d4fde/pofodesesabito.pdfIn PDF document text
    • http://carolinaboatclub.com/userfiles/file/21528191475.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/est5m275b1pk4tfv4fv6k9bevc/26475263129.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0914ca5628---91139156919.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 10972 bytes
SHA-256: 0ebfceea969169ea19e975139ac5a1836bc57b871239f0188da366ea03846588

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