Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20f910b3bee4980…

MALICIOUS

PDF

79.9 KB Created: 2021-04-07 19:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5eac458ef51e782fd28344015be6bb2f SHA-1: ab715ff53e8c4221caa450787a4d8d68d656a5f4 SHA-256: e20f910b3bee4980517d4baeb632ea2d96930a3087e6458ba72efaf6abb40eea
126 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 phishing or trojan payload. The document body, though heavily obfuscated, contains references to 'cloud formation answer key' and numerous embedded URLs, suggesting a lure to phishing or malware distribution sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a large number of links on disposable hosting, likely for SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=section+18.2+cloud+formation+answer+key PDF link annotation
    • http://zipogagu.iblogger.org/balearia_denia_formentera_50_euros.pdfIn PDF document text
    • http://besuxiju.22web.org/math_symbols_and_names.pdfIn PDF document text
    • http://opencabinets.xyz/how_much_does_home_depot_charge_to_install_a_tankless_water_heatersyy4c.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/ggCghhg/sacrifices_must_be_made_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/Z3hbih0/farinetupimi.pdfIn PDF document text
    • http://pribor-poverka.site/20393659051wyjpi.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/p4pji4g/wallpapers_for_iphone_xr_white.pdfIn PDF document text
    • https://cdn.sqhk.co/goxejake/bHHljgK/94655909308.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/biomedical_engineering_research_projects.pdfIn PDF document text
    • https://cdn.sqhk.co/rapenikidu/gF8cCii/ramenojolokamolasubago.pdfIn PDF document text
    • http://zarozunaxa.iblogger.org/25498364876.pdfIn PDF document text
    • http://forexgeeks.net/stand_by_me_song_lyrics_meaningzoo5n.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/igRubaa/perozaniboratu.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilibosukotijob.epizy.com/pomebinutedav.pdfIn PDF document text
    • http://mafokesa.onlinewebshop.net/broiler_poultry_farming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f7c6f7-1cf3-4f6b-852d-39236bce4f01/what_is_revision_control.pdfIn PDF document text
    • http://furosusuz.epizy.com/the_adventures_of_huckleberry_finn_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a44361-4fcd-44ac-bd9e-c5a085edecdd/what_is_the_tone_for_the_poem_theme_for_english_b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 1604 bytes
SHA-256: 7f8d84f279369098eff929b81254410c3caa7ba096a52b3ad4234465cd67bf56
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 5936 bytes
SHA-256: d0679c77745e682d33af416adbeefb347b9c64d16a2be1aaf45a0c7e43297aba
font_02_sfnt_off00010af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF5 10888 bytes
SHA-256: 18815d200a4019deccca5d9b74961eb4511149b38e2da53342d9d84536ad472c

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