Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fad17e5d3a4518…

MALICIOUS

PDF

83.9 KB Created: 2021-03-24 06:54:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dc41a53c48b4f1ea605b57ee29058595 SHA-1: 721e7de366b1c34c1afd40bd8f6e4cdd2bbc901d SHA-256: 21fad17e5d3a4518aee367c3e63e9fc53aafdac38f3f8d3fe4ebe2a8deaa2898
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=hoover+windtunnel+t-series+tempo+bagged+upright+vacuum+cleaner+with+hepa+media+filter+uh30301+blue PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451027/normal_6031dc40aaf02.pdfIn PDF document text
    • http://laguduzimunek.22web.org/how_to_use_m3_smart_bracelet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_5fdbac9c05d2b.pdfIn PDF document text
    • https://fuwiwidiwijidex.weebly.com/uploads/1/3/1/6/131637339/1316052.pdfIn PDF document text
    • https://vizodejow.weebly.com/uploads/1/3/4/3/134356937/8946156.pdfIn PDF document text
    • https://jovogivodarula.weebly.com/uploads/1/3/5/3/135325070/1141872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cf4ed29f-d1fb-4c4d-a551-fcc0c6fdc77e/bugero.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_cec818211f5c4e9bada905c82cc7afd5.pdf?index=trueIn PDF document text
    • http://tezuzatarezoz.epizy.com/house_electrical_wiring_guide.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/nuriwuwunuri.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/pokemon_x_android_citra.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/splash_splash_love_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfefef7-ed34-4dc1-827b-187c27654836/34234728685.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/wedding_alcohol_calculator_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf5f82a-e155-48ef-b6c8-9a6fb4c903bc/how_do_you_write_a_good_self_evaluation_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/akcent_songs_hd_1080p.pdfIn PDF document text
    • https://4b98dde3-f65d-4e11-807b-d4501949e87b.filesusr.com/ugd/4a7ebd_8dc9f17913904f52bc06e8c37f1c8ecc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8275e225-b46c-4952-aa95-d63d3d76bc05/how_to_write_a_letter_of_recommendation_for_scholarship.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 6092 bytes
SHA-256: 6ca61ec635572945ae7106b14e09dd0bfcdf85f7382a0c69794c16d8e9b2febf
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 12916 bytes
SHA-256: 4af626d6160ab6437c0fb1c19561806de7837e960847a1df20d17c990d0651ca
font_02_sfnt_off00013306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13306 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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