Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabcbe01bf7306a5…

MALICIOUS

PDF

75.2 KB Created: 2021-02-23 20:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5172827d68101d09979e398eacd5e1c3 SHA-1: dde853d739d70bda9e8a266fac81c403a024b005 SHA-256: eabcbe01bf7306a5ffe3201ad22d6353766f4b33b3d9d6202e5565aabc3639a7
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. The primary lure appears to be an image linking to an SEO redirector, which ultimately leads to the URL https://leonvi.ru/wix?keyword=square+planar+molecular+geometry. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest it's part of a phishing campaign, potentially leading to credential theft or further malware delivery.

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
  • 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://leonvi.ru/wix?keyword=square+planar+molecular+geometry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486033/normal_602693a7b3d0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445321/normal_5fde884743ab4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5fc82d2276e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_601d21dc769dd.pdfIn PDF document text
    • http://shtampshop.ru/ba_first_sem_booksd62jr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380214/normal_5ffb2ae092486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_602c21603570d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_6020524325a8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5feb4076ac8f8.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/kelukakeb/apqp_second_edition_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/9497394710.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/avatar_250_cho_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/ye_savita_dj.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_off0000e8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D8 5404 bytes
SHA-256: 0e2a87c616fdaac5ad67766c584dc7f9aee1f050f9ff0fb67ab76ba06e80a328
font_01_sfnt_off0000fb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB33 10752 bytes
SHA-256: 0ab37558a77b82d26d8bbf67aabe9418eb5307815f491f95d7999d1dc5e039be

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