Malicious PDF — malware analysis report

Static analysis result for SHA-256 34aa6a1249c2a0e5…

MALICIOUS

PDF

75.9 KB Created: 2021-09-05 23:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 253a0bdc06e746c0d84f89036233d108 SHA-1: 255a24376c235d0745b2b447db0aa031b1ab54ff SHA-256: 34aa6a1249c2a0e56b328f69daabebfebc98bbc9a8c76729fba7c0218d9aa274
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://archism.ru/uplcv?utm_term=pdf+image+file+to+microsoft+word PDF link annotation
    • http://zrdb-drogbud.pl/Upload/file/2303025999.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/11444782962.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5a15841b671d35015bf31c43eb689613/mevirozekonegubanexu.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/migipekelijaxipimi.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c64285e762---38398794943.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2a7d9971c4a8e62d66cc4a59c6d4e799/jixuligijub.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/tewekopik.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/77a71f26e18701563a43d94ba39cc163/lagofafafiwowixi.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71503284729.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ca36a3e27---vejowubogodunisex.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/32783933726.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822b19bfb41---88758436243.pdfIn PDF document text
    • http://0930actress.com/files/files/39266816843.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/zuwaxufafe.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c87c3f6b739---padis.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63945680579.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/sokojuboxuzop.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/girulo.pdfIn PDF document text
    • http://naso10.com/userData/board/file/mulizijimerimobixil.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/edddb8f090194635dc0717b5fcf89a3a/losemuxevoxoraba.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/92241084545.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/59463656318.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_off0000c1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 10800 bytes
SHA-256: 5d8f761cfa301d2027f9440cf8439ac0af9ed73275025aa488dbe24978eeec45
font_02_sfnt_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 18724 bytes
SHA-256: 7d97df0a9da2ba0702c41c354a1ce24595e24b375013e2617a9a82107b8c877a

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