Malicious PDF — malware analysis report

Static analysis result for SHA-256 077f05a76cc37906…

MALICIOUS

PDF

76.9 KB Created: 2021-09-03 13:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ae2a6715b8877ebface077decc4a3706 SHA-1: 6b74711d3bdba31afb527bd7845c19b84ba35931 SHA-256: 077f05a76cc3790609843b9ac952e69178abeba3b07ec540f171c99e4e36176d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains flagged as link farms or hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The file's structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://sungwoneng.com/upfile_editor/2021/files/vajuwuviveziwajupamudaso.pdf In PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58567998394.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095eb7773ef6---bovubavunajifej.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a50ae6c4c7---xaromugubopijex.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/bcajbq2207a6got3dt6cpcm05j/joluvinimuxarexofuvexotaw.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/xosotevokinabago.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/lojuxixib.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/76299650287.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/7919975763a0506e156ce8aa53deb2ee/19927993089.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/kabusu.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/77319921893.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/95788386716.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72471708127.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ea8mn9jgm6st9ikpbpa4ifa6v3/26712670762.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/31566106361.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f8009c36c---55733466924.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/7e9df43b3567c259df7d1ce72ebbe287/53489051021.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/j9l9o102jrcdijnm8servok5hj/97255565105.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/lolixarasusowuli.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/gafisuwamabimafuture.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/kowelepoboleseje.pdfIn PDF document text
    • http://agrion.org/upload/fichier/kutesemefoso.pdfIn PDF document text
    • https://aokman-drive.com/d/files/pabotiluzenapema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=larceny+act+1916+pdfPDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/44547445050.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A2 17456 bytes
SHA-256: ee2622f875617d41b9895e5068b7fa88d0677ed1c43a30ca0e4cf62c0186ee37
font_01_sfnt_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 10648 bytes
SHA-256: 30125a9601c9ffefc1f7b9c7e29368f68449cd641afefd7fa3f3d47a8a6eb719
font_02_sfnt_off00010e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1