Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f376a56df7c2b7b…

MALICIOUS

PDF

75.6 KB Created: 2021-03-25 15:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 99ee0052d70f8887da4116a7cdb9ba02 SHA-1: 53dd3a2a7dcbeee29503ec2ca5d663434bb5e22c SHA-256: 6f376a56df7c2b7b26baa188c1b413e43ded448b8416d7fcfc13215a9b814788
186 Risk Score

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, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing operation. The presence of embedded URLs and the PDF_URI heuristic further support the attack pattern of directing users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://xezojetit.ru/wix?keyword=simple+plan+happy+together PDF link annotation
    • https://xovotirepotu.weebly.com/uploads/1/3/1/4/131412955/zirex_rupumawoweri_nupedixam.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/biogeography_evolution.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/vesokij_wanitorozafo.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/4731607.pdfIn PDF document text
    • https://sovonasu.weebly.com/uploads/1/3/1/4/131407222/1649639.pdfIn PDF document text
    • https://jevizaja.weebly.com/uploads/1/3/4/8/134869407/vepelenikelob.pdfIn PDF document text
    • https://vobogokofudukig.weebly.com/uploads/1/3/0/7/130775751/kodepinalisekor_tukera.pdfIn PDF document text
    • https://kuweperiti.weebly.com/uploads/1/3/4/9/134904821/vorebezobe.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/90677909424.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/used_behringer_pmp2000_powered_mixer.pdfIn PDF document text
    • https://zisidolig.weebly.com/uploads/1/3/1/3/131379992/4183087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sagoxexo.epizy.com/buzogisu.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/icloud_photos_without_icloud_for_windows.pdfIn PDF document text
    • http://guvubaxi.epizy.com/bhagavad_gita_full_book_in_telugu.pdfIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_dbeabcb58981400b982585d7604119da.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_b408e6b6eb0e488db587115ad20bdd64.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/defecto_septal_auricular.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/netflix_en_lukt_niet_iphone.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_47575e3eb69448ae807a9660a75ce8b8.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_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 5260 bytes
SHA-256: 73e5fd23ac8c98868e7331fab2cc90f1053973fef149a70c92c698b79b2af551
font_01_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 11384 bytes
SHA-256: 3a038f62f4f23277faca84906c04a3bc6a6f9ebd178b3e8dab75e16a1b870b08

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