Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2a1d92e85a1bcd…

MALICIOUS

PDF

74.7 KB Created: 2021-06-25 20:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 085e36002dddc0cfcd7972c07a652882 SHA-1: 1ebae48680968ff8d8b84e35f146a836463c9e1a SHA-256: fe2a1d92e85a1bcdd31f55c50c471268b5718a2c92540c6f84fb093f0ce60b85
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised or disposable infrastructure, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://lab4050.com/upload/editor/file/62725527776.pdf
    • http://vietthanhstone.com/images/news/file/24833127381.pdf
    • http://syuncyoku.jp/upload/file/zifedinazamogivutules.pdf
    • http://eksan-ltd.com/userfiles/file/57274730126.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1778fc54df---879363651.pdf
    • http://classicalgardenornaments.com/uplds/file/wodofudajidun.pdf
    • http://www.biotanika.pl/upload/file/71814993341.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd360a552a---dagive.pdf
    • http://www.centralperdana.com/file/buxure.pdf
    • https://cmsschoolkg.org/userfiles/file/korovikowiteje.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d1832f2eef3bf2232290a40da2ad3741/41798905494.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/nq7bojsl2b8vrg4fci3ggdmp0r/siligenemasatadonovobemi.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe2b6dd492---lorizivaxewukejobu.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6e20d9f11593e9db53c1a7d54895333a/tuxiludogodexofegonema.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/c9fc34788779bea6f4748c6ef2aa1df1/wirosisakosazofer.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/p79jkguage1jeirbqpf486u1sf/punixabixabukufal.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a668c17b9---91877075531.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/6face9ad71e0db26e21fd25732287496/84595530972.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/e9011b711f94d3d7244279e8ce16f3d4/gawewizalasepe.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608075c578059---vulow.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/03eeaeacfd76323606bf652081b7c145/93093584075.pdf
    • https://mt-creativestudio.com/ckfinder/userfiles/files/2796543822.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/969751c4b8e2eeeaf62fdd68cdf4510b/disawatuveradarujuga.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7f6424f57---nobofudegizibidoliz.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9ba52ef3b53de2f4af0a4e519b0854b6/bezinux.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/0958cc22b3a1dc2101e1241b2d54c4a7/5568456878.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=addition+of+negative+numbers+worksheet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off0000c1b8.bin
dff5cf92df00eaa13aeeb82603c561491c1a264488abf78572b196d83781ffc7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B8 11220 bytes
font_01_sfnt_off0000dbb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 16792 bytes
font_02_sfnt_off0000f3c3.bin
8095a7f0758d7ff550769dca4a544c66b2d246d7bb014f526093a8f5550cd3df
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 16200 bytes