Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0ea0581f7dd70d…

MALICIOUS

PDF

75.3 KB Created: 2021-05-01 19:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ee5c681e0b9613809d4a8e07eb1e5d38 SHA-1: 393247b1579b39d45247d32d551c646dcc3fd974 SHA-256: 7d0ea0581f7dd70d2ca0461b7b7a59826937e0fd9694673a19779d01bcc2c007
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a 'possessive nouns worksheet 3rd grade' lure, which is a common tactic for disguising malicious content. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=possessive+nouns+worksheet+3rd+grade PDF link annotation
    • https://pinuwolaterogus.weebly.com/uploads/1/3/5/9/135957395/vukofu.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/resexogomidire_lukowexu_dofewij_kekipi.pdfIn PDF document text
    • https://bajevopado.weebly.com/uploads/1/3/4/4/134456845/gexagoviluduseve.pdfIn PDF document text
    • https://dugesadodi.weebly.com/uploads/1/3/1/1/131164249/vofifarase.pdfIn PDF document text
    • http://farexirofabi.22web.org/clark_forklift_seat_covers.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/9749592.pdfIn PDF document text
    • http://gekiwejal.scienceontheweb.net/37952175609.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejesezape.myartsonline.com/adobe_pro_2020_download.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_77bbca0feeef48c1af0a487fc59f9d75.pdf?index=trueIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_ea623cf63cf940759d654ead80d8ceba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcdcb753-c8df-4a10-826c-a4be9dfb2a3f/what_are_the_5_aquatic_biomes.pdfIn PDF document text
    • http://wakurenup.epizy.com/importance_of_self_awareness_in_counselling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f07d64b9-2b6d-46c1-bd4d-a11a231d1ceb/dodafiferedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf88bed-a933-4595-8870-35e345647b62/what_is_human_geography_ks1.pdfIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_5b28f807095a4f369a6029c3058cb22a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c09ffbd-b877-4d1e-94d3-fc35fadc07ac/sketchup_2014_free_download_64_bit.pdfIn PDF document text
    • http://jokokitot.rf.gd/the_expanse_books_best_to_worst.pdfIn PDF document text
    • http://tanonarimunal.myartsonline.com/cloud_computing_infrastructure_as_a_service.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/77639475478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6981dea7-50d8-4b45-b8a6-1ab732633973/what_is_meant_by_big_data_in_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1e3562-20db-420e-9877-20976fec6345/79042524839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280e344f-3501-43bc-abb2-0ba18aceaff3/which_is_the_best_lazy_spa_hot_tub.pdfIn PDF document text
    • https://93a2b5bb-aecd-41dc-861f-07dcdefec443.filesusr.com/ugd/dee83c_68068dd5366b4af9af4f48be20c5686f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f11b9b9-55eb-4561-b130-df5d9ba0342a/how_much_caffeine_is_in_monster_vs_red_bull.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_off0000e5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 5436 bytes
SHA-256: 202fa9ae9a82e166e415e0b82d160139d48dc79adf1719d7795d718fe3e5d34e
font_01_sfnt_off0000f85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85E 11828 bytes
SHA-256: 156041a5191debeb52011b0eb6cdd44e35b1cd71817963337702efce726cbf7d

Open this report in the interactive analyzer, or submit your own file for analysis.