Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd1fb192e9d7216…

MALICIOUS

PDF

69.1 KB Created: 2021-09-22 17:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a7c35d99e3eb73fcc74179532b4beeb7 SHA-1: a730cfc04388ff2b2a7e87ad527deab8cf8c6481 SHA-256: fdd1fb192e9d7216160c0f7be08fa122ed31896849bcd1df5c8a5f3b8fd156df
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely to redirect users to malicious sites. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://residenzaeden-albisola.com/userfiles/files/36499194770.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/o1t1ugknr6vsgdhcpje72pbks4/sanegeguxiwupotijumuk.pdfIn PDF document text
    • http://rc-modeller.se/images/file///towejafovuraxadigan.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/bexiz.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/zogodopoloxu.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/22116849597.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/mutunidaruzilo.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/kofolanavujosowu.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/3154669988.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/wozudozijovipabumojid.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/13200497566.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/66623816711.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/19955350070.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/levita.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/xosafelirurexozaneloxo.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/120415379160.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/5f6de7a75790412bbdbf2de9dafdb025/99261166970.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/vubixogejofupir.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/68645070716.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/56844149881.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/20876376296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=full+bollywood+movies+freePDF 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_off0000b160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB160 14728 bytes
SHA-256: aaa1358679eb682ab99b308a8a26cfd72b3b4777cd5f5aca35fb3b30d159b2c0
font_01_sfnt_off0000d66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 10632 bytes
SHA-256: 8df24ac1d65c432d36d2f26262617c39ad52af514fab4f9ffbaf77ad5c76aad7
font_02_sfnt_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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