Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e72155e5f014ee…

MALICIOUS

PDF

79.7 KB Created: 2021-02-11 07:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf1f341a88c8c105c564c6fd3c3524ff SHA-1: 6bdc9756b7334a399f4a472c48b22686dd98ec42 SHA-256: 62e72155e5f014ee0360d7201d5ec313f5e970238f212a1f404ce63bfbafb0ee
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. One prominent URL, 'https://jacksth.ru/aws?utm_term=boot+pelo+pen+drive+windows+7', suggests a lure related to operating system installation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/aws?utm_term=boot+pelo+pen+drive+windows+7 PDF link annotation
    • http://table-wait.com/98643732193lp6z5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5fc985ffce4f3.pdfIn PDF document text
    • http://nonimejusujajo.22web.org/guided_meditation_morning_5_minutes.pdfIn PDF document text
    • https://redewude.weebly.com/uploads/1/3/1/3/131379671/matijififinisuvozeju.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/fumopadumafoze.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/gdxgj5s/nunonugetexonarofepitub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_600754017695a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413735/normal_5fcf5887d8aab.pdfIn PDF document text
    • http://xruhdfo.site/52472791890elitx.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/hoverboard_simulator_robloxmm7ss.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_601e0737a1034.pdfIn PDF document text
    • https://gizetaxawu.weebly.com/uploads/1/3/1/8/131871526/1a3752b9.pdfIn PDF document text
    • https://wasizizinawuj.weebly.com/uploads/1/3/6/0/136096362/lutaf-puwum-nonagev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/dedupipisikepewotafutukis.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/30818778758.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/39556635426.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/linens_and_hutch_sheets_reviews.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
    • 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_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 5024 bytes
SHA-256: 587e538ae87404e6baf638a655d12bcf0788ee86b79cb60b55c70f9d87026bb4
font_01_sfnt_off0000f661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF661 10896 bytes
SHA-256: 2810c5df2a9dbd29308075e403195d33313c3e076a7a95c8497f1c424545782a
font_02_sfnt_off00011bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 16340 bytes
SHA-256: de4d8b2f57bd79f1a868fabda613d9936b110e31710edd4728466090b424b6ff

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