Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f95ed12c4fb11d…

MALICIOUS

PDF

76.0 KB Created: 2021-03-20 04:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb495fcec193cacf8e407f1023025052 SHA-1: 734492a8266633016317f885df5f3ec45ab4726c SHA-256: 61f95ed12c4fb11dd2b4af1f7e6d4d6e8a11809b92d57651b2b4fc67c0f298c4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document that contains a large number of embedded URLs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure malicious links among many seemingly legitimate but ultimately untrustworthy ones.

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://botokaw.ru/award?keyword=boserup+theory+of+population+pdf PDF link annotation
    • http://setokanekema.mygamesonline.org/modern_hebrew_alphabet.pdfIn PDF document text
    • http://obzorov.site/can_obd2_scan_tool_codes4kmpf.pdfIn PDF document text
    • http://kovokowem.iblogger.org/jotube.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/66874767195.pdfIn PDF document text
    • http://rusidaf.22web.org/dilozefisi.pdfIn PDF document text
    • http://fujepopini.22web.org/57929111435.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/how_to_determine_allowable_bending_stress.pdfIn PDF document text
    • http://letxxnx.org/how_does_the_shining_book_endd4yft.pdfIn PDF document text
    • http://labincom-med.ru/defined_design_templatef3v9k.pdfIn PDF document text
    • http://kuzojud.66ghz.com/relative_clauses_worksheet_grade_5.pdfIn PDF document text
    • http://bitsracing.net/the_divergent_series_allegiant_free_online_movie5k081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec1c062-0a71-4a72-88c4-816b92dd9efa/what_does_fluid_reasoning_on_the_wisc_v_measure.pdfIn PDF document text
    • http://buketoxepebaf.epizy.com/honda_rancher_manual_shift_conversion.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_96d60c0b17384ba38fa662d35c22dceb.pdf?index=trueIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_16b401f3ec41405fba26165c0e5e7278.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70583ffb-b87c-4583-9a34-c8db195549ef/88962848092.pdfIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_ef53a9fdf73d49f899657ce03be3ff70.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54515d6c-edef-459b-95a8-7aab53e98215/pajoxisoba.pdfIn PDF document text
    • http://pepebejawu.epizy.com/can_t_google_chrome_from_app_store.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 8

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_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 5280 bytes
SHA-256: 7d985684b0d31699f65d6a032dc080b6c8e385d5d877ddc825a88d72252ca963
font_01_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 10208 bytes
SHA-256: 443706b5120386a65c6eee35aace90697d0693125a990ef7855caf5f950a9ae6

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