Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc581b04dea73f0…

MALICIOUS

PDF

83.4 KB Created: 2021-07-16 05:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b7c8894b56cf9345a8770d2dc50ec58 SHA-1: d885789bb8a4364cd1cbd03db97fb5007546df12 SHA-256: bfc581b04dea73f0966c8819dd00d47e75c34a47f32846f1372ac4ba521e827a
162 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for initiating the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7437

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b77a9e9f8011be8959e8f91744988dae/63976867611.pdf
    • https://condominiobrisasdelnorte.com/userfiles/file/44712146351.pdf
    • https://ev-owners.jp/userfiles//files/5920248899.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160badc5424d6b---18353517414.pdf
    • https://forthepeoplegov.com/userfiles/file/supadilorujijufa.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a72ec17b7---woxafivodoruveledi.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/33l8ud6gq40pm440j3mml6dsbv/fasenitedorekigu.pdf
    • http://hnspkjx.com/d/files/80906522776.pdf
    • http://nedirajtebosnu.net/userfiles/file/kexonobiximazaw.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa324abc1d3---vogafufo.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/sehqrnk02u9eot14ds04foqfsq/68411324578.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44667da466---16356730464.pdf
    • http://fresh-j.info/images/uploadedimages/file/tukubabijukubelige.pdf
    • http://ebiocell.com/uploadfile/file///2021052218483930.pdf
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/79933583144.pdf
    • http://reanda.com/jingkelun/userfiles/files/20210713124333.pdf
    • https://hasekei.jp/userfiles/file/nilakolo.pdf
    • http://aisef.org/uploads/userfiles/file/file/56077143575.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/c881fd79a562082527f8069989cb6bbc/veloluzi.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080d5c455e44---41219577130.pdf
    • https://soechi.net/userfiles/file/xosujebebozadewelafep.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2ab1be8f9---jedinowimugigipuxebonus.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dw+text+meaning
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df46.bin
69aa5a2a84a12da07507ee1ea6d0e6d0b06dca7e9c1ebc0728e47663a68e051e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 10208 bytes
font_01_sfnt_off0000f63b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 16792 bytes
font_02_sfnt_off00010e4d.bin
c531d029d3caff9e85833f6f7539971ab87571332fc05cedfd193beb8ce526b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4D 17364 bytes

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