Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6549abd6bf87053…

MALICIOUS

PDF

103.1 KB Created: 2021-06-27 07:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12eba869d6f0451d9586660c58b10106 SHA-1: e129528ea17ceb2cb51f8851ad7f8336e8df1fe6 SHA-256: d6549abd6bf87053a7460085c66e97ee535940aa8eacb894a8e49e16f09b52e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final destination or distribute payloads through various means. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

Heuristics 7

  • 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.
  • 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
  • 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://technocom.pl/editor/file/fazarime.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/modetorejumenixemilezujag.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160886692350aa---riberobovuwejomiwokuki.pdf
    • http://shahnawazonline.com/uploads/files/22736564955.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/edf41e53623e015b7de3bbccd7b593d1/bomeresesorapapigamagej.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/bf9671662828b07c102ef40df68c75b7/potewewakotosaduxani.pdf
    • https://kawanmto.info/contents//files/48773312647.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/4d457ohbpgm2pgsbbkel72cdj1/bokomigo.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734f06532fc---kegoxefugesilimi.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091599bd954f---21466492012.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc16eb9a61---86061704828.pdf
    • http://czapla-dachy.pl/public/images/fck/file/gifaluponirim.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/111056fa3445169a2645687638c442c4/42102583208.pdf
    • https://healthmatters.me/userfiles/file/64245077249.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a297efc06---47531108593.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/c514ee0aa44804071e4b6363b7b77476/funixisorukimilifaninofox.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/jh2k8ipktqsaeenp7hkg7r3t4q/wufikuninuko.pdf
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/xawed.pdf
    • http://smithandfriendsfamilyreunion.com/clients/d/d0/d05d9bb0b75700e7199fc64e52c62161/File/60482280903.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608936053046c---59792177824.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd3c4730b---32155966240.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076a3520687f---95567062804.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57ea21903b---texurosotulugelujir.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=duchess+meaning+in+english
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000114bf.bin
2225391bfb9a3f6f1e42609226aeacd7ae0218b5e7497a078450b0f00735a616		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x114BF 17728 bytes
font_00_sfnt_off0000fd3b.bin
1f8d22414a187ac92da2f31d54dfcf390bb8aecbaa31d3cd9774ffcd26211668		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 10460 bytes
font_02_sfnt_off0001308b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1308B 16792 bytes
font_03_sfnt_off00014898.bin
b3310bb722f6cc486e34f71c6eba6d7a795710503baa41b6ce26176c616bc447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14898 2372 bytes
font_04_sfnt_off000152fc.bin
ed9be218225668be2de4a2f06eb8f8cdefbcf8de903d3faebe19a920745a9aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152FC 22716 bytes

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