Malicious PDF — malware analysis report

Static analysis result for SHA-256 73945bb345acb9f2…

MALICIOUS

PDF

75.9 KB Created: 2021-04-06 21:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b7efdc27a04649089ce8f599e9f75b5 SHA-1: 1893971a0bcde269dbc08f06354feb49a5f1fccc SHA-256: 73945bb345acb9f20148618f8019a91b01f0bd17a4c3f5860828e683e70f85ec
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery. It contains numerous external links, suggesting an attempt to redirect users to malicious sites or download further payloads. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://seumenha.ru/wix?keyword=snail+mail+game+ios
    • http://spainsale.pro/92521562121ozef5.pdf
    • http://vizojuzoninunoz.scienceontheweb.net/cardiologia_guadalajara_7_edicion_descargar.pdf
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/wudonebularebox.pdf
    • https://cdn-cms.f-static.net/uploads/4454559/normal_60198eec65970.pdf
    • http://kigurumi.org/the_shack_chesterfield_missouripgbxk.pdf
    • https://xamivozafuju.weebly.com/uploads/1/3/5/3/135308546/4940305.pdf
    • https://cdn-cms.f-static.net/uploads/4425209/normal_6021661812b0a.pdf
    • https://cdn-cms.f-static.net/uploads/4372080/normal_60526b3017ef7.pdf
    • https://dobuxodujunov.weebly.com/uploads/1/3/2/7/132741154/bubefumeve-wofaz.pdf
    • http://bikejesoxatelo.mygamesonline.org/list_of_stock_market_ticker_symbols.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_24a5905d32fc40b98953a83f5b1ac168.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9cd1f190-fb9b-4923-acfb-7588a7932299/tappan_stove_oven_not_working.pdf
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_2d478565e3f74117bb8d792736e87cea.pdf?index=true
    • https://uploads.strikinglycdn.com/files/097e448c-87bf-4a3a-a32e-ae72e62ae360/how_to_calibrate_my_vizio_tv.pdf
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_e65c95306fdc4747a295ec6bf02fb5e7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e2bb31ae-8e80-4ada-b8b6-4bab4adcb4f4/15630307001.pdf
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_04e57175c844441ba7cbc4a024168409.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3a0a8624-b55e-4859-a50f-037ac92f00d4/how_much_is_a_tesla_model_3_used.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaab.bin
ff8bd3ad7babebbb8053bc173ce6f2e75199d24b36e435b4d4f49c5b711a7e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5012 bytes
font_01_sfnt_off0000fba3.bin
15b81c39664a3961cdb0b653eaa500c4421f10ef81b7ac2031847b124b42fb0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 11524 bytes

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