Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bab302a0e2f2404…

MALICIOUS

PDF

65.4 KB Created: 2021-06-04 01:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e55363cbdd1e68694343cd840c2152a SHA-1: c077bc9214a102d6fecb1efbe6e5a9023b912f7a SHA-256: 8bab302a0e2f240488a4ec0e6413fe7a9c1c182c865e90d798d60fcb19b619a1
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://amblamy.ee/upload/file/sakasamope.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l3k2v9um68nj9tvv0kb15loqb7/falalevuwatarokisafijixux.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832bf9ac06f---40290542061.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/bd123d97c8190e18b73c653e028fb3f4/17190353031.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d631b090f3---lepinikafabunolikutazax.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a276f2fde6---woxitufewelebujefevo.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/runonegetiju.pdf
    • https://x-software.cz/data/file/11181145561.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a23d5d8ef1ee85ab08106e8eec586086/bodufuduputelu.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/kotagotevijatape.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f3fd12d34334f01fc8fad472fe541c30/bafitetetosazobekoxamev.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4adf13dda---biritefadotumifobiv.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809ce981d19---48791879965.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o40rkp6800nabb2g5aat6fkko0/8078660441.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/c6b2ee640bc668eb6af553671859547e/37003609192.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=best+oil+for+vanguard+engines
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ab.bin
caf370187e57092aa927fc0da14657d1ed221dc2893c298d192a41406fe3ecc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 5184 bytes
font_01_sfnt_off0000e269.bin
982a32b1789a83735f46169eface11bca54bc903875d55b90a31f3c165da8721		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 9808 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.