Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e1e8da4f735b78…

MALICIOUS

PDF

68.8 KB Created: 2021-04-04 04:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc07e71b904abb6b87ed80ff86050f57 SHA-1: 51031ed47f372c0cc2bae08c76da857a50423ce1 SHA-256: 78e1e8da4f735b78b6729460cc6a49ac7afb8a861b25ac7156d266703f235b8f
136 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 ML classifiers, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic firing suggests the document is designed as a phishing lure, using the promise of free software downloads to entice users to click on a malicious URL. The embedded URL, https://botokaw.ru/strik?utm_term=autocad+3d+building+dwg+download, is the primary indicator of this phishing attempt.

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
  • 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://botokaw.ru/strik?utm_term=autocad+3d+building+dwg+download PDF link annotation
    • http://bijavamu.iblogger.org/android_studio_toast_shortcut.pdfIn PDF document text
    • http://baykamif.space/zozizedudutidileugdrd.pdfIn PDF document text
    • http://rte-ita.fun/what_are_the_ranks_in_one_punch_man_destiny10bol.pdfIn PDF document text
    • http://tajezedireg.iblogger.org/46553355553.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/mitejebupusoko.pdfIn PDF document text
    • http://musc-media.xyz/berodoxakuwugaweaatp8.pdfIn PDF document text
    • http://rebujeboxuveme.iblogger.org/love_story_song_lyrics_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/69850818548.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/silicone_gel_sheets_for_scars_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/wulajaxevonap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fe1a5432a82b.pdfIn PDF document text
    • http://politach.com/259068054196bpm4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5fdf7f013d2e2.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/32281561923.pdfIn PDF document text
    • http://9gusevshop.space/cream_dapple_dachshund_for_salebm16g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480161/normal_60190c536a1a6.pdfIn PDF document text
    • http://italywow.space/tugonis65d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenuzuwemonuda.epizy.com/xusosunivebur.pdfIn PDF document text
    • http://jabelakejirer.epizy.com/tupamuperexudikebusun.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/66341874198.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD056 5220 bytes
SHA-256: c483ea1c95ee8de0e982f434fd2c412d193f98883471126a0fffdba531d37473
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 9956 bytes
SHA-256: 81c2401dae5e37b8c285f71c9dcca41cc9cd4de4e1e59f962c39091a8a714f45

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