Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc552a09b194cdfe…

MALICIOUS

PDF

74.5 KB Created: 2021-03-17 22:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 518360f001088b0bc1fe5247e55efa49 SHA-1: 5e860f5c161e4dcd5f0d35c8ef1f0573d16d60c1 SHA-256: dc552a09b194cdfe42fc2cab29bb50936db617a4427f821da52bbbe5b1521021
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=ethiopian+biblical+names+for+boy PDF link annotation
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/nariguti_jinixidewivimib_vutivivekil_kijotig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454671/normal_5fd90a10624b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_600f64abe67b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5ffbdd3001844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377931/normal_6005f627555ca.pdfIn PDF document text
    • https://cdn.sqhk.co/tivomepu/DoDQXic/25702039898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491164/normal_603058ba288bd.pdfIn PDF document text
    • https://pidolanapeg.weebly.com/uploads/1/3/0/8/130813957/tutanun_zulokole.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/jasokiloxajovixiw.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/Ajg6Nev/download_game_take_off_flight_simulator_mod_apk.pdfIn PDF document text
    • https://niruzezigup.weebly.com/uploads/1/3/4/8/134889773/5902476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_602e0d8d02e59.pdfIn PDF document text
    • https://pevivifigevesiw.weebly.com/uploads/1/3/5/3/135315965/vugobufe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5ffc212f7a83f.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/jbif4xm/jurassic_dinosaur_game_mod_apk.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/e7c21a5c-d741-4e70-939b-fce72f115cf8/nixil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc44c2e2-531d-4a71-b0a7-fc59aa053787/how_to_get_adobe_premiere_pro_for_free_2020_ryan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0af299-5421-4268-8dc6-d3b5aaafd62f/zomawabezaguzade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93aa38a-ea84-4acc-b37d-53ffdd176a35/samsung_smart_tv_audio_out_external_speakers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28345cd2-8930-4a75-b27e-02726e967be6/33836488897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540434c4-b8c9-4ee1-8fbe-acedd214e26a/linear_ld050_replacement_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6de00c0-2571-4366-ab7c-0e6cf49924c0/how_to_change_my_heating_thermostat.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_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 5452 bytes
SHA-256: d5d93e63798c83c4450e10379240ee7faee57999c5eddd7c68231071e47ac71b
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 10808 bytes
SHA-256: 811be0e0f12e2310aa549eb2ec54e37dccd9bd7e1b67e83d4afa9c1b2072be51

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