Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64d445df356f512…

MALICIOUS

PDF

74.6 KB Created: 2021-01-26 10:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 61b681b52de02630c6e8f6dce0e0bada SHA-1: ad7e8522de65ba51d4544eae8eba6a1e62cde27e SHA-256: d64d445df356f51275fc5a88c216b606aabbd39e5e3a82ad1bcfa1f12410b8c9
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing attempt. It contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to other PDF documents, likely for malicious purposes. The primary redirector URL is https://leonvi.ru/123?utm_term=personality+plus+test+florence+littauer+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/123?utm_term=personality+plus+test+florence+littauer+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443610/normal_5fda6a26e19e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5feccb5c26a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447663/normal_5fd67d5086063.pdfIn PDF document text
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/juruv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5fc80b7ec495f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5ff7819fc8d72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465400/normal_5ff53f0bebf87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384484/normal_6006309d271a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501514/normal_5fcb708e8f865.pdfIn PDF document text
    • http://rupitori.66ghz.com/92159032113.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421624/normal_5fcc6d2501ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5fd3d1f42c31b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5feb34b5cb8fa.pdfIn PDF document text
    • https://zavuvomexuwu.weebly.com/uploads/1/3/2/7/132740545/6016250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5fd81bb4c8c7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382208/normal_5ff5e96564d0d.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/mezudoferoniteni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soxalisaxofaba.epizy.com/can_t_chrome_extensions_network_error.pdfIn PDF document text
    • http://jabowedufup.epizy.com/morexenusumavofamek.pdfIn PDF document text
    • http://masekafisixovok.epizy.com/balloon_game_karna_hai.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_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5252 bytes
SHA-256: eca905d6d96b044a03e098a53c08b083c9064b5efe1009f49f936cccd67ace80
font_01_sfnt_off0000f8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 10500 bytes
SHA-256: 8849b6569876dc5807a2484736b414d47e3b4594b6393cc9cfb37f9630c3610a

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