Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ad7ad6ad34f22d…

MALICIOUS

PDF

86.4 KB Created: 2021-02-24 14:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a61736c292e5067590e40a0398f81dd9 SHA-1: 5f2772983088aab0a02b5016b2b72f1a17fd825c SHA-256: 57ad7ad6ad34f22d277506fa7500b770198309c0d172c2561c57319e6742e0f5
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized redirectors and potential malware hosting sites, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=forro+dance+history PDF link annotation
    • http://bit7.top/how_many_watts_is_the_vizio_2.1_sound_barxxqz8.pdfIn PDF document text
    • http://idealslim-ordina.site/3525481466tq0dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_601b005bd34e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fcda63a54c51.pdfIn PDF document text
    • https://dezuvatag.weebly.com/uploads/1/3/4/6/134667454/5138749.pdfIn PDF document text
    • https://kabibejago.weebly.com/uploads/1/3/6/0/136050231/edee6fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_5fdb54479e20d.pdfIn PDF document text
    • http://stopro.store/mikinisakuxoxopaxuwisanb45cr.pdfIn PDF document text
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/waduboxezowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugosixefi.epizy.com/vujuva.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/add_video_extension_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/44976059025.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/acid_phenol_chloroform_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/volkswagen_golf_2019_manual.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_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 5052 bytes
SHA-256: 956acfb9bc6120b624177c78f8ac3e902a9a08f39a8f2a34e2b0d542cb5bbfe6
font_01_sfnt_off00012a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A31 10148 bytes
SHA-256: ea2d8f356d767a646f01e4ee996065481c037105dbf810091a40489cccdf8b58

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