Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c78a6b974d4e22…

MALICIOUS

PDF

73.3 KB Created: 2021-02-21 07:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 40d2dc4995a538d0b954dbdfcc162605 SHA-1: 4ef55e3c8a777d3488c09c450e2ed98e1d9df873 SHA-256: 78c78a6b974d4e22e5e963355299a022de0001e6b5ee32a2261bf453fc32e0d7
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous external PDF links, many of which appear to be SEO-redirectors. The primary URL identified, https://maypoin.ru/123?utm_term=how+to+read+the+life+application+study+bible, suggests a phishing or scam attempt, likely to trick users into downloading further malicious 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/123?utm_term=how+to+read+the+life+application+study+bible PDF link annotation
    • https://cdn.sqhk.co/kopilixa/iiUfwIU/who_can_craft_griffin_weapons_witcher_3.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/fihhfgi/56716929046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_5fe633dcc5681.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/1SgeJii/vapisirixog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5fd5fc281b119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_600a53af1fcab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_5fd39ec6eed37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485313/normal_602e3472d63de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fffc36307f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_5fe99a2b1fb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5fe8dff22aa41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418973/normal_5fc9f60025a03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425738/normal_5fcd3a4823b41.pdfIn PDF document text
    • https://tawugeri.weebly.com/uploads/1/3/4/7/134774142/5bd72978f40379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369308/normal_60043fa901e2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 5420 bytes
SHA-256: 1b5c7cae9d18b16485177a3d299460435bea176249f6b38cbd4a5cab4b5a5314
font_01_sfnt_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 10540 bytes
SHA-256: 9276cc80b28d15c76b9f045949768b59cc282baedd746147858a9f30059a0384
font_02_sfnt_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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