Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f34a220c66e62e…

MALICIOUS

PDF

78.0 KB Created: 2021-03-11 08:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 56c97b28847ac8bd37d603b0c1c32da3 SHA-1: 4423e1f9c0b317e683c25212f0409268255f5ccd SHA-256: 78f34a220c66e62eec33fc9ca2298d83ff75f71d5497be940460960ae7463d8c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/award?keyword=agile+project+management+templates+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479933/normal_5ff48b4c60d69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fd8fa0c8105b.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/computational_fluid_dynamics_jobs_australia.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/risk_management_and_insurance_harrington_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_603a058bad757.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/maze_runner_3_full_movie_123movies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fece78076e05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_6047d5210b9d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470837/normal_5fef6dbfce630.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5ff9aa0e183d8.pdfIn PDF document text
    • http://gasolotiravizid.sportsontheweb.net/lugorudagomabiralilubul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bojafazes/wwe_news_bleacher_report_smackdown.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/92160836837.pdfIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/nufuwatogon.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/hexa_tetra_flexagon_template.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_ccf64a3ea821485bb99a0ead4085225d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d22afc-30a1-43db-a56d-7e83ee97201c/what_is_a_general_warranty_deed_with_vendors_lien.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e82bccd-6fab-462c-8e4b-2b7c2f9990f1/s_kiu_truyn_phim_online.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_4fc39dfa0b4a451095c0dadfa33b95b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea642bdf-8663-4cef-b95a-f013817402c1/jidivifurufaragika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41e8d45-0a70-49b1-8f94-eb12955ba409/vigenugafes.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_off0000f46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 5540 bytes
SHA-256: bc904478eeee8bd118e950eeef6f638e149c81516affadc89402c664e5220ebc
font_01_sfnt_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 10328 bytes
SHA-256: e7ac3196233bd94e26d0fba209dae365312f3971ffd2ccddc68e9bc7101ced18