Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c635fe2203489f…

MALICIOUS

PDF

121.1 KB Created: 2021-05-14 06:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e7a8a694f334f2a52cc44b223877f35 SHA-1: 841aedfcdbed27744b4605f7e99ea7eb539947b8 SHA-256: f2c635fe2203489faa5592c04b899951108559bbfa8f39a8b04c95a7a39cdfe1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised CMS upload storage, suggesting it's used to distribute malicious content. The document body, though heavily obfuscated, appears to reference popular media ('Avengers endgame movie') to lure victims. The presence of multiple external URIs and link farms indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5316

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
  • 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 http://bebelino.ru/userfiles/file/telojedajosubikebamobot.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8ce8990e22a7d11090709157570a7347/51936804757.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/dhun193uvsjorkrtatcili9u4o/rilenemibadaxotefop.pdf
    • http://artospace.com/pics/file/numovisazu.pdf
    • https://liniagdanskzydowo.pl/files/46940557212.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084b3b3e5d18---39046187025.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/6b052aee28f624b77433de29025595c9/19203176364.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf8e9d62e---nofikowe.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb3c382e8c---35135212133.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/92kv23ideiu2icuq0urqhd8005/nuzibasosorevonawelaxidu.pdf
    • https://angkoronetour.com/userfiles/file/24817047388.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/cius7f5p4gce9jt7chpuophstl/80964854140.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/72abb9f40941913ae47a4c3e1658b965/veluvutaburim.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/0c9a67e42ebe530ce295439dcda359f2/jeruxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=avengers+endgame+movie++dvdvilla
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ec8.bin
e6a2599fc7d48fe600a9da4bd2a7b36caeab50cf799f6c01c980509423fa8c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC8 4188 bytes
font_01_sfnt_off00017d94.bin
07c544b6c3e4d42424c50afed73ae89b49fc140c6cdbd7a3d1c7d193b4076fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D94 5196 bytes
font_02_sfnt_off00018f34.bin
c90aece37306ba3cd79069c01fa554b8ebebd310782bbc90f009b75d0848ad7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18F34 12904 bytes
font_03_sfnt_off0001ba87.bin
b1150be4d70906ec5a34a2ed30d20cff81f764da92b5b83a8cd9b8b5754c33ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA87 16276 bytes
font_04_sfnt_off0001d05d.bin
177cff7d05a6c3cdda3ccc64401a896e3c4d75502335dd683686db9365c13683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D05D 4656 bytes

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