Malicious PDF — malware analysis report

Static analysis result for SHA-256 b676c076efe87ded…

MALICIOUS

PDF

89.9 KB Created: 2021-09-01 11:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eef1800b277c75afa580f6de10e4d762 SHA-1: 55296c8f58bc4b9a92489e23b1fc65c31f30fb80 SHA-256: b676c076efe87dede2b8bab850e4a5409f7341820828b52d605e835d6d7054f4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous embedded URLs that point to compromised websites and potentially malicious content. The presence of these links suggests an intent to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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://www.ferm-matic.fr/upload/file/fimegivimajeb.pdf In PDF document text
    • http://bbdecontra.com/userfiles/files/42293728207.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073c804ca5d0---tebelixidutuvugegazer.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103ced051f7d---91142394436.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ecff7d9c2c84a8b5b525fc9b73f78a90/wewefotifakapume.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/8541469195.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/gijovupiwoxotewe.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d0c45d341---96873017778.pdfIn PDF document text
    • http://willbramephotography.com/momixelidofulumara.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/86ca2a9e720e7cd539fa6838df2903ea/92907767057.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b052fe5e---70456688486.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/37493875444.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/88149284283.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c80fb2261---15837954915.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/tabepufiletafipubufovu.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/91887967898.pdfIn PDF document text
    • https://combrooncom.com/contents//files/negazujuruvuz.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc86d4fb6f---porufetikedibub.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/23896155732.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b062c9bb7---viwirejotokuvujuxakowilo.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/77095354085.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/21742418694.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/bodikimomedakekibi.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/qrllqcos11pjj9uootue1mf7bo/meninilunomedojesalipoki.pdfIn PDF document text
    • http://artospace.com/pics/file/18818747979.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/69642914327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=guardian+home+technologyPDF link annotation
    • 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_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 10904 bytes
SHA-256: b0cad1608b429b1990047e6ed9eab4ac36fb18824a0de843c4d0e51531b5ca24
font_01_sfnt_off0001125d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125D 17600 bytes
SHA-256: 32889b63be7789835414a097413c539e07d5e452262391d30af9f86a99c94032
font_02_sfnt_off00014057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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