Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da290542b29b57b…

MALICIOUS

PDF

80.8 KB Created: 2021-03-20 01:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 089481c3b348555c0260afdc86d240b6 SHA-1: e11fc07f5e68e9b1e2254f72bd45317c9543d969 SHA-256: 9da290542b29b57b5c858ba6113d9ecca4f29b52f7625de57b501ab8458833f6
186 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including ML classification and ClamAV detection. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=world+war+z+game+can+you+play+split+screen PDF link annotation
    • https://mukojemugasab.weebly.com/uploads/1/3/5/3/135314074/9913737.pdfIn PDF document text
    • http://my-favshope.online/pms_to_cmyk_conversion_chartm6hhb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_60268dded77b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463287/normal_5fc9279ac1021.pdfIn PDF document text
    • http://phillipen.online/72058689056lu5oi.pdfIn PDF document text
    • http://jsexj.fun/7018588098543byx.pdfIn PDF document text
    • http://loveantravel.xyz/720489529723idad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454420/normal_5feb01728c53b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_6017f838b01c6.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/1e31c6e6bb08f1.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/9fcd317b-bc94-444c-908f-b6a3a90d8fdb/tascam_dp-24sd_mobiele_recorder.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_05321b7249f44326823da30478195c34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/962e2955-82ba-4663-b6b9-bcfd51426683/how_many_sight_words_should_a_2nd_grader_know.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f469b07d-6f72-45ff-9473-9274c72da392/how_to_earn_pmp_pdu.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_d20764f0154c468abca4f12bca5c8be8.pdf?index=trueIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_11dfd14bc6dd4a80b568ff870c817edf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8560af12-b285-4586-bf5e-f2ece70b3a34/72016350397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c57d2c-d063-4319-a2e9-06b2cf49cd96/how_can_you_prove_that_sunlight_is_necessary_for_photosynthesis_lab_activity.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_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 5652 bytes
SHA-256: db4991aaa9b24b5bf4e8f9624d57955bb391c2ee2af3fc31cd0acf39d792631b
font_01_sfnt_off00011084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11084 10360 bytes
SHA-256: 52e4ab41f0cbcb3fecbda1334877ac77c0955ceda6fd880c2504fff13331aa45