Malicious PDF — malware analysis report

Static analysis result for SHA-256 93775336678b7b4e…

MALICIOUS

PDF

90.3 KB Created: 2021-09-02 19:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7729b3d051639ef534adc6ca9a5c57a5 SHA-1: 1071c4f8719a8aa9d7dddee0d320583078df2a9e SHA-256: 93775336678b7b4e47f0621a2a92b09e729c829f4d62f40c19ea244cfe70018c
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=gate+2020+syllabus+for+civil+engineering+pdf+with+weightage PDF link annotation
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/1760400585.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612a6e9ab0755---60771465855.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/p9j5av4n0rco40a33iphhkp1i6/wurunovoxe.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/84195136636.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/68329656610.pdfIn PDF document text
    • https://yuh-tarng.com/userfiles/file/rutedafofedigukazeriden.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16078fb1c8caab---96469086050.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a82731d259---nixijado.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1c77740e---13457599781.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/joruzi.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210714_0595A428465B5094.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/xepodesozitib.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c29b9377221---xudaxesopikitimof.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/d32pinhqunpapu5iqfamsn4934/sigerobeni.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a929fc10479f4c7bb60a2fae0e9f99f1/jazemiterefixebiwokidun.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/17669909727.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/wetesinago.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1612b7aaed1d34---viwasomogulafujebimefa.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/jitafaforon.pdfIn PDF document text
    • http://gtshotel.it/images/file/gizima.pdfIn PDF document text
    • http://nccutrackandfieldnation.com/clients/2/2c/2cea5a7e730406ee40dfbbde6098010c/File/junupaji.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/23721932674.pdfIn PDF document text
    • http://beijingteye.com/upload/files/32377461410.pdfIn PDF document text
    • https://fotovipvercelli.it/file/67781562020.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/eb9b92f02e98fab5bd1fc64182c4eea7/xiguj.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_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 11684 bytes
SHA-256: 8ed5463560abc622edae90afd1e78c5a32e98ba6aff1e4ac47300dea0bac1065
font_02_sfnt_off00012a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A05 18116 bytes
SHA-256: 7e3b86fa49b0bd97954b7aac9e3bfb3e5b2ebb704dc184dad8197abfa4ea72a8

Open this report in the interactive analyzer, or submit your own file for analysis.