Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2be48cf6329ad48…

MALICIOUS

PDF

77.5 KB Created: 2021-09-11 13:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a35468fa95a68fcd4f8ad1f4238a8a8a SHA-1: 580a6ec7ee8918f2e8d22b483bb39e304aca10de SHA-256: d2be48cf6329ad48ca425964ab0c524e094c4c78ae7e3a76e0a526109a3d6cf6
134 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous embedded URLs pointing to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags the document's structure as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pokebarslo.com/uploads/files/83791518487.pdf In PDF document text
    • https://ctners.com/ckfinder/userfiles/files/81575412904.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/vatonijelowafi.pdfIn PDF document text
    • https://termofriz.rs/files/91426519526.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/2528967964.pdfIn PDF document text
    • http://ruresept.ru/files/file/94484596461.pdfIn PDF document text
    • http://www.heksan.com.pl/file/7226477164.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/wimamigo.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/61278173018.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/4qftpft53v8qss8eg0rldcq5c7/wevijenudogexitiwape.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/zevekewurorewudetituta.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/wibuvosejo.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/34297408064.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/12276349988.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/gazisetapaxetobe.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/zifujoromarudobaboxegeras.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/mikiribapa.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/sirepofimarule.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/pikubupo.pdfIn PDF document text
    • http://mayjack.com/upload/files/sopuru.pdfIn PDF document text
    • https://atrax.hr/files/razoravezitewel.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/rowivowibuvuromex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+a+phone+companionPDF 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_off0000cbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFD 17376 bytes
SHA-256: e759136d57c4bcfb1de9f79770fa360dd82a882e75f8321ef734a05a87cac9b8
font_01_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E4 10488 bytes
SHA-256: 673453a3495b8cc718cb0bbd239b7bc6855b9c0d8bf704e5b90c9d97aca332a1

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