Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bccb25959938ccf…

MALICIOUS

PDF

80.6 KB Created: 2021-02-24 09:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 144dad5fcae2a1ea948df336972457c8 SHA-1: 3252fb825be3102db171279bd25c3996151a160a SHA-256: 9bccb25959938ccf3eb3a401768225bc99ec069bde4bcfc1503a530cd34aa340
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wix?keyword=christ+the+king+parish+and+student+center+baton+rouge+la PDF link annotation
    • https://rijijuxika.weebly.com/uploads/1/3/5/3/135346754/nejozesazefulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469863/normal_5ffb59f2ea00e.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/Rgjhejh/97325949060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5ff272f868c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_603450db7b7bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_601ae553df641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5ff3b0e5914c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451228/normal_5ffc1a9267c30.pdfIn PDF document text
    • http://amst-watch-v1.club/man_search_for_himself2bnq3.pdfIn PDF document text
    • http://lesuzod.iblogger.org/wika_gir-_10_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/ijjqgeu/pegiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gubitubitaxe.rf.gd/33633052603.pdfIn PDF document text
    • http://sakikuzugodo.rf.gd/idiot_test_4_answers.pdfIn PDF document text
    • http://baduwujik.rf.gd/kauai_county_property_tax_maps.pdfIn PDF document text
    • http://zateguzosarumaw.epizy.com/xidiwumufizedenagaz.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 5444 bytes
SHA-256: 9d766df34aa7351399d5e68d3cb480120c12704db31a70b1e125fc67f3ce4194
font_01_sfnt_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 13848 bytes
SHA-256: 03b505fdef8c45b3a534f400c1696acb66f94e9701a2095581e0328e0ebf5400
font_02_sfnt_off00012694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12694 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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