Malicious PDF — malware analysis report

Static analysis result for SHA-256 468571434ce11521…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 12:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a84b743fa2a699af509c66393d20537d SHA-1: 8e6cac7d44b7308e7268f31115914ad911d1256e SHA-256: 468571434ce1152159a81b44e125f3eb7827c0b192f64c2e673db9d2845b1652
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pokewaveanaheim.com/uploads/files/77524268878.pdf In PDF document text
    • http://pechati-piter.ru/userfiles/file/mufasumenusunapabesomuvib.pdfIn PDF document text
    • https://www.leeja.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5004d7bdd9c0c3e94d7341977850e6a/4305897916.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/af3aefef3054eec536396e1e6795abcc/zexanavet.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/bupopevixivuzuminowe.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f62d8505f---beduferiralofuwetesomaja.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b14e325a8---ruzatugodo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/3dcaba500b77f736733d6f51336acab2/39750823877.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/votabutedu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608980b91bfa6---notodulakaxetogijisi.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/kedixatojiwifosam.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/nanisirulomokonofuriwugo.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/kojawazobezovazejunu.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/wopebivuzedilu.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210903_5D23BA539CA3C7CF.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ec549c935---woviduwazega.pdfIn PDF document text
    • http://ahchala.com/img/file/22706262052.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/0509b683c93b63aef8bc3fb5157b48b5/rigoxijarixirugazaxezisaz.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741a16ef4e2---43006482988.pdfIn PDF document text
    • http://smithandfriendsfamilyreunion.com/clients/d/d0/d05d9bb0b75700e7199fc64e52c62161/File/5642364734.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/xidetiwonerixeli.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/49741460480.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/9d233409e3b54c1d4cda7018211637fa/55743752927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=roles+and+responsibilities+of+panchayat+secretary+pdf+in+tamilPDF 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_off0000d3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D1 16632 bytes
SHA-256: 7a0307a15420b66675141756fe29a347f6b20f7a420df9fe6d99f5e0c0d1b0e3
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B6 11184 bytes
SHA-256: 78e70934fd4c4481f3ffd66ff62e1761a2870344d21f49b3533689e8fc692dca

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