Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1df79afa706e05f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-04 22:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8450af329308050108d181335e8e043f SHA-1: 486502970bcd4f4e6228aef6defdc30f8ebebbf0 SHA-256: b1df79afa706e05f1034161d166619651186f5e0564df18eb38fb31ee7c4490f
186 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, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'persuasive speech topics'. No scripts were extracted, but the presence of numerous external links is a strong indicator of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=good+persuasive+speech+topics+for+college+students PDF link annotation
    • https://poxolegap.weebly.com/uploads/1/3/1/0/131069824/950a4acf3f66ab.pdfIn PDF document text
    • https://xiwaxodo.weebly.com/uploads/1/3/4/3/134319271/7675561.pdfIn PDF document text
    • https://vipamabukaxeban.weebly.com/uploads/1/3/0/8/130874648/riberibib.pdfIn PDF document text
    • http://scrlt.xyz/52443784440hy00r.pdfIn PDF document text
    • http://how2clever.com/2005_honda_pilot_transmission_cooler_problemsref0j.pdfIn PDF document text
    • https://vudefuzafovafid.weebly.com/uploads/1/3/4/6/134630521/mejalot.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/xekitulirejesimuve8klh5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_eb5303c0c971487589e6a93903a4d629.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a023ee-74e3-474f-8abe-156e31eb7dcf/22137549625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73eee63e-8b0f-42d1-9311-415b436c82b9/lawn_boy_phish_lyrics_meaning.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_a2966ea11792497ea1a115cc3b271993.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_87f12762086e4cc5bea273e2e957bb7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac51249-56f7-409a-9e50-8f9f774998c4/minn_kota_terrova_foot_pedal_tray.pdfIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_7adaf8671da24e5c803e895163714e15.pdf?index=trueIn PDF document text
    • http://gujabusenetawun.epizy.com/wanepunokulewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef7a907-629f-475e-8699-309c310433c0/how_to_get_sound_on_google_maps_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a2f4a7-ae45-4f35-8de1-dab15ed4451b/how_to_thread_se600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de26b40-45b5-4c95-99d9-5d5581c783e2/english_grammar_workbook_class_7th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b81cb5-0b3a-42eb-9eab-db8b7f8a737b/how_to_win_at_the_sport_of_business_summary.pdfIn PDF document text
    • http://widafasamuj.epizy.com/77281251534.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_050418e147da4efa95af11d06e6a0483.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d68ec8-094c-4f36-a6bb-d213f860e515/schwinn_fitness_ic4_coupon_code.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_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 5508 bytes
SHA-256: dd548860744217f48f8de250944054f273e98996b90c1bb8924bb3cfa0a0900f
font_01_sfnt_off0000fe13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 11260 bytes
SHA-256: 06dbe09bead0e86fb1059507957899a3a7259f5a92acc131f49389408e25844b

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