Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a0669893b58cac…

MALICIOUS

PDF

81.2 KB Created: 2021-02-25 15:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 542459577b875cf9d78471639728b64b SHA-1: b725eb0a49b27402a0b47092c8aa53bec449bef2 SHA-256: b5a0669893b58cace6d1edec64d0dfad89ff9a2c69bd2a18b6b8abfa9986a388
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains an embedded URL that redirects to a page offering a 'kitchenaid refrigerator service manual', which is a common lure for phishing attacks. The ClamAV detection name 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=kitchenaid+refrigerator+service+manual PDF link annotation
    • https://ralanuda.weebly.com/uploads/1/3/0/7/130775203/827313a9f7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471988/normal_600b9ce64d287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383912/normal_5fde90a0a9d37.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/x8HOhjb/40934924432.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/agggieT/download_dynamons_world_2_mega_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/jrihhaP/tik_burger_shop_2.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/xoguwavosuje/game_tester_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/xexexuli.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/66444012361.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 5464 bytes
SHA-256: 5253bb9f66f336ccdc2666600113860148e2b6b7821d74f1cc45dc79ffc01bad
font_01_sfnt_off00011534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11534 10308 bytes
SHA-256: e00433833dea7f6fa8cb94253dda3fe7d173f978d0f56fb077db049c0760acfc

Open this report in the interactive analyzer, or submit your own file for analysis.