Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7db1895687a3be6…

MALICIOUS

PDF

85.5 KB Created: 2021-03-17 15:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 34ede72b588259a0d79a5ee9e5a161bd SHA-1: 54e40301d2db31f509dfd45b5caf8f2a2206a47e SHA-256: d7db1895687a3be6bd10047a7beb45a9b9c16af122a74e1cce5b5bf43b8b0dfb
194 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish for credentials. The presence of a 'download' button lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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 https://vilenefex.ru/wix?keyword=anna+maria+mayda PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5fdfbb764cf0e.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/craftsman_miter_saw_10_inch.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/kutapebimegire.pdfIn PDF document text
    • http://zoomita.space/kakorowexakizeduvevaz72lw.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ihhajfv/maze_runner_cast_now_and_then.pdfIn PDF document text
    • https://mifepomaxa.weebly.com/uploads/1/3/4/8/134897651/1250405.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/iry8ijS/luvosiguluzagepowuwajuku.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/owtVWS2/buwawiwedefab.pdfIn PDF document text
    • https://berapozi.weebly.com/uploads/1/3/0/7/130776213/vukizivapumoz.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/adverbios_de_frecuencia_en_ingles_ejercicios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_603b03f676b22.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/geYPNib/milugagigoketegovumo.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/7679236.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411273/normal_5fc5cf9a3d918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_5fc8a484f32cc.pdfIn PDF document text
    • http://parhelifrl.space/global_citizenship_definitionom311.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/bJEgf7M/golitipojawobunarebomabuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_b6a70f06f71c4b3f9588cf82e1ac3d38.pdf?index=trueIn PDF document text
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_39ed41d679c84d1cb33cf56bc0b608f6.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_ca16f64601834fb5a2fff55a750ca502.pdf?index=trueIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_f3829b90bf1f42cb8afdb87e22985e40.pdf?index=trueIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012fe7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12FE7 17096 bytes
SHA-256: 6cb614c5d63da28f3a7c308860bbf70c7fd9af31a149eff52839d9ca00e5a423
font_00_sfnt_off0000f61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 4852 bytes
SHA-256: 8e2eace6dd7120ab09a201348b04a9877cca54542a053f83c95007befe5f92db
font_01_sfnt_off0001068c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068C 12084 bytes
SHA-256: e87a2864f507be0f4aebdaedaa70b040bd7845d1603e28d58875ea640b98b6c9

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