Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02d030cf9f6e44f…

MALICIOUS

PDF

79.0 KB Created: 2021-09-24 01:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 15a5300c9228287f9882f8c909011c1b SHA-1: d9329b62778e6f39d106ae7a45e0ab5ffc5e6f67 SHA-256: d02d030cf9f6e44ffb9106aa996f04cb962a394f6c4a5db5f27616f4ebfc67c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs pointing to various PDF files suggests a link farm designed to redirect users to potentially harmful content, possibly for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://drinkpoint.com/uploads/files/26854377885.pdf In PDF document text
    • http://gldbirdgel.com/user_img/files/85179002.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/73939318142.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109140700471473.pdfIn PDF document text
    • http://jucal.es/images/file/39391368902.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/pakonoxitetadem.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/vovujolalatekavebagape.pdfIn PDF document text
    • https://undergroundtakeout.com/userfiles/file/vigodaganajizuruvufopori.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109022033251952.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f496e0aa94---75669250606.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/dejiwakeloxexak.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/92933267260.pdfIn PDF document text
    • https://dacola.com/upload/files/76823260445.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/vajufivupelowedafa.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109060013213414.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db29e5d604---kametejat.pdfIn PDF document text
    • http://grabnerestriche.at/40044513399.pdfIn PDF document text
    • http://airfa.it/userfiles/file/84039972174.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/pugevorolitajajanovubum.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/51803945133.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/72652246017.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/jijowu.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/81664249778.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=snaptube+apk+download+2017PDF 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_off0000d04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 17520 bytes
SHA-256: 336f5117f276bd9ec88c7cfcb86f430b8a1b11910a61142ee511362e00f23f34
font_02_sfnt_off0001158f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158F 10860 bytes
SHA-256: 5b2208e6052035040af22c0e4275398387c4af8e004743a0d69165f86dd8f2ff

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