Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d16f8fb5a1af7ea…

MALICIOUS

PDF

78.2 KB Created: 2021-04-19 22:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3e9831acb3bf1e49dfd0845f2e073341 SHA-1: 2568ca7f164b311031d3f2b967ac0197a6d85572 SHA-256: 1d16f8fb5a1af7ea0f17b4f4b9c7745324b223f674907053833c0ef24482a749
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment, likely leading to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=fisher+scientific+traceable+thermometer PDF link annotation
    • http://domen3.club/tugirubokasatusoxekevgeq4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_60380ca6481b9.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/tijajatefuxafe-zifowizaw-zolakipo.pdfIn PDF document text
    • http://telgrm.site/the_secret_law_of_attraction_in_tamil_movie_download5nhz6.pdfIn PDF document text
    • http://prosucre.pro/what_is_an_economic_revolution_meanjc4i4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_606a46bd4f66a.pdfIn PDF document text
    • http://tizezs.xyz/can_you_live_stream_from_propresenter55pw0.pdfIn PDF document text
    • http://extraterrestrials.space/nwsl_team_rosters_2020ijh5b.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/4115409.pdfIn PDF document text
    • http://vladport.ru/kanawha_county_schools_calendar_2020-2170ud2.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/406d713c-1263-4b0e-b84c-5c87706adba7/how_to_date_someone_in_jail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24582322-9fd8-4537-b74d-7c5ad78b791f/87515770947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2192cfc-54e7-425e-be00-24c6fdc5d0b7/62165215114.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_260f0a37e0cb4da58184a60de7d9d4a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2749e59-e43e-472c-ba9e-1b8ee4a0f83d/financing_balance_sheet_meaning.pdfIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_e93914789bfe42739d24db43156b6833.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_2a344bd51c7b453e9afa7abe96f46409.pdf?index=trueIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_ae8ed6d061d045a79912f51017ad1e60.pdf?index=trueIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_ba8aae86bc5d438ba241ab6b6ab3c34e.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_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 5216 bytes
SHA-256: 3c7dcdf836337823642f2248cf6641a5e1fa2745096a73bf2e7133633a4177d0
font_01_sfnt_off000101f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 11732 bytes
SHA-256: e3ccf7dbda84511770f42a879d7c8b768d7e8b0580ef895dc01dfca1b6072b95

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