Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c7cd1d5ca4efd0…

MALICIOUS

PDF

86.0 KB Created: 2021-03-07 05:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7ca84b8b423d35e580f35f4c36ed0cb4 SHA-1: 93dc3fee8aa35c649571ec727b2624a0d883eff0 SHA-256: 54c7cd1d5ca4efd09eefbbc303165f6ac9468a1214a80efb37dfd85348a15968
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users. One of the primary URLs extracted is https://botokaw.ru/aws?utm_term=amelia+bedelia+first+day+of+school+summary, which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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/aws?utm_term=amelia+bedelia+first+day+of+school+summary PDF link annotation
    • http://promooffer.site/biwifasufoe0fx.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/hyperkeratosis_treatment_guidelines.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/59465860831.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/linejudofuwarulo.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/best_portable_cd_player_to_use_in_car.pdfIn PDF document text
    • http://labincom-med.ru/vodefefesufebofb0ru.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/keno_je_toke_bengali_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/sivapuranam_tamil_mp3_download.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/324e5e3b-9e14-4fc7-bd68-5f82e60ad86a/28400722134.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_ef7a5f9ec141484a87bd4f4652c17448.pdf?index=trueIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_94003a3a619b42c386187e829514d9f2.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_540a48801eb14adaa7b4ecf28d9bf845.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0484f5a9-79cc-4406-9e9e-9f66d1b3dcea/53639621247.pdfIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_39c7cd1d09aa4207bb88386b75808ba6.pdf?index=trueIn PDF document text
    • http://tobikinos.onlinewebshop.net/how_to_put_sony_mdr-xb950bt_in_pairing_mode.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_3ef3ea41825c4a1f81349a5fd5d5fa52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/063784a8-ff1c-4008-8074-bd8080760fb6/18972665790.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_17ffa4565b3c411cb68b984912425b78.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ed41bd-2e6f-4628-a12c-95ded66d7130/how_to_write_a_restaurant_review_on_yelp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb342c11-d997-43b0-a958-6349b4bf13e7/11162244180.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_e95d041b5fdf4be081d874c036758010.pdf?index=trueIn 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_off0001134a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134A 5492 bytes
SHA-256: 17d9efb745e4472cb0356e2073c63ec657ef40504ac9dd805f456a4e04fab59d
font_01_sfnt_off000125cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CF 10948 bytes
SHA-256: 18ffd4b3f7fabb3829fdde445bc93257febece5dbe937e5eec0a78b831f618db