Malicious PDF — malware analysis report

Static analysis result for SHA-256 0154e637bd3f6ed4…

MALICIOUS

PDF

88.5 KB Created: 2021-07-04 06:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb74195693b025e5f33eb39f69be7705 SHA-1: 0dd968b8d970ee5979313be447485abb9caa065a SHA-256: 0154e637bd3f6ed40e59c6845c0471194376753cd20995255aab751975c4df8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users into downloading further payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://9meclinic.com/ckfinder/userfiles/files/komiwasa.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/il95fkn8br9otnk9fdtg7nna2h/88135733057.pdf
    • http://spamsmsgiare.com/media/ftp/file/mawekofumedimelefogo.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3ed97e34e---rodatakarezilovitudabuzem.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6f7eed11ccfce082c2572ddda8cceb88/57145364729.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/fbeebceba4d56a732a2f83b8a782299e/37031644451.pdf
    • https://cavalier-hundezucht.ch/userfiles/file/27106652275.pdf
    • http://kientrucnhacuagio.com/upload/files/kuxariwelesej.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606c786097ef4---58897113558.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/h4ek92viocastaio8eve9ltk53/16170181333.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d522ba27a---26029628353.pdf
    • http://stlukesfp.org/ckfinder/userfiles/files/wodug.pdf
    • http://mikailang.net/userfiles/file/20210609025546_965964197.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6beec5b0bc---zinisobowamig.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/aalu37aspoc2a7phcf6ju71efq/wepito.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a87330f3caf---67825475662.pdf
    • http://heyumpnd.com/userfiles/file///zurowekunakinolebar.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/cd03ef4c909f676bed8f40fae9b107a8/sugazewotimujijeb.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/9e0157efaa6cd72d3aa8b0785718491a/vomuvovusiguzetoxir.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/adea93vpe6poiva3uu8pu1vd87/1708271934.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/8bcac913c19aae47791d5a04b297f63b/4764799078.pdf
    • http://czdashan.cn/uploadfile/file/2021043001020573499.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd53f7bf6f---raketexaza.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=national+bookshop+day+2020
    • 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_off0000f70d.bin
37891c03b9d8b0de1f0819e0f20dbae247fac03a3e54e0380a670ae406a3d986
pdf-font-stream PDF embedded font (sfnt) at offset 0xF70D 17244 bytes
font_01_sfnt_off00012404.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12404 16792 bytes
font_02_sfnt_off00013c1b.bin
1aea6ad603ceb0e6d4752d5eaf717764890134679085d21945061a76d35cac44
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1B 10824 bytes