Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae73d3982a673f69…

MALICIOUS

PDF

66.4 KB Created: 2021-02-21 20:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 88ae526fbfa029b756fce5ab282156cc SHA-1: 4d5718c1d52f52390739981e54527f89e25a28a9 SHA-256: ae73d3982a673f69e3c7235707837617d69af38eeb5822194f4415e2ac2168e7
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a malicious redirector link, specifically designed for phishing or malware distribution, disguised as a Sony owner's manual. The primary malicious URL, https://yafferge.ru/123?utm_term=sony+str-k740p+owners+manual, is heavily flagged by multiple security tools. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=sony+str-k740p+owners+manual In PDF document text
    • http://vizit.store/bizegenezisonisec299p.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/eF6tjfG/3187732712.pdfIn PDF document text
    • http://dihtyar.online/dukuzugov3p1n8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_6031b0c7387fd.pdfIn PDF document text
    • http://barashik.space/call_of_duty_4_zone_english_folder_downloadmlg7e.pdfIn PDF document text
    • http://milanomodaitaly.site/15656218739gdls1.pdfIn PDF document text
    • https://cdn.sqhk.co/lipidupi/hgEPagj/peteponisuxebolowefan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422658/normal_6016034187e7c.pdfIn PDF document text
    • http://scm03.ru/cv_voorbeeld_template_wordjdrkr.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/lanaladu/gauntlet_slayer_edition_necromancer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/acapulco_restaurante_formentera.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/maduk.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/arya_2_malayalam_movie_400mb.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_off0000c4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E5 5668 bytes
SHA-256: 5f965912eb0e5b2dc7f9da40bd025b7971a7d509eac9514d411bd0c52ee35b1a
font_01_sfnt_off0000d843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD843 11036 bytes
SHA-256: d0cdbf03f6b7fe21a0877daaf23d4cb9975889fa7cd0d77be80ece73ce0e6701

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