Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e21c5994c894944…

MALICIOUS

PDF

94.5 KB Created: 2021-06-28 09:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37c35ce2d49670843d0364ac90027cba SHA-1: 04db5450983450cbac2cda28d1e6ac703843ed0f SHA-256: 5e21c5994c8949440bca1c0c2950f799f4a4e52365fbbcc29fe19807ca066d56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to trick users into visiting malicious sites or downloading further payloads. The document body is heavily obfuscated and unreadable, providing no direct content clues beyond its structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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 https://allytemp.ru/uplcv?utm_term=countable+and+uncountable+nouns+list+pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607705904aa0c---xuzekososagusubisevixiz.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098704dcb014---gubowibefikinubiro.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608e853392f3a---gawagokedemujifu.pdf
    • http://www.infos-lentilles-de-contact.com/images-sites/files/mipotosawosexukewufak.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d8e0b779---18002693209.pdf
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/99847524333.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/hpmm60l5qdgvtc94ma06epg755/kufutijobilonuwibop.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a0a7b75b5730b44c8f62cfdab7b95795/19380756208.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab228bd2903---70054701468.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab64da6ed10---pebusarigov.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fd4f8411d0d086ed8e183603e70fe602/sagelowix.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608803da9ca95---dakufarejufevigupe.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769ea0e16e6---dasiremubewamifimog.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/5e7655cbf89e02fe0db6c1aba3565486/35993262742.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/bhpsc6m55n6kih4d2garb26ran/kuzinuko.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/c20c81b12ae57f63d21dc42927a74b7e/dakizosujiwitogetelolare.pdf
    • http://trans-serwis.com/userfiles/file/99678233978.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf7fca998---72973518669.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/49eea8a57e8fd4dfcbcf1926a96b04a6/90269952344.pdf
    • http://ibshop.gr/uploads/_uploads/files/gogewejeluwalunu.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f40e0d084e---dijoreworilutefex.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d1a69be883bdd4bea58ccc714457c2cf/34938895581.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d3f3fb829bc62bba74a012d809702799/matinetetozuges.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9dce493803f333c1c2130f89ccfcbf54/32463680728.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91536357342.pdf
    • https://jahanchart.ir/data/files/file/vifuribigixaxixogelubipep.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8aad612e3---miletidowigububobodegabu.pdf
    • 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_off00010f92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F92 16792 bytes
font_01_sfnt_off000127a4.bin
f0afa9246fe05e4c337a41fb41cd6c824f2916d5edd13917016f5c46a9e032a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127A4 16896 bytes
font_02_sfnt_off000153a0.bin
8cbc2c57c0a35e8bc00b9a0d848a0805a81bb97aaa252d5200b14cdff3c4a9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153A0 10784 bytes

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