Malicious PDF — malware analysis report

Static analysis result for SHA-256 330138c275361d4e…

MALICIOUS

PDF

82.0 KB Created: 2021-04-08 14:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ad6c10f4c5604277b59a671d463657bb SHA-1: e776153fb453d2887746824f907479a1f51aa873 SHA-256: 330138c275361d4e65ed753ccc7956c8f03c5c47b6d807bdc3ffb6bcecd94b22
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, many pointing to disposable hosting and acting as a link farm, suggesting a phishing or malware distribution attempt. The primary malicious URL identified is https://dugedepap.ru/strik?utm_term=simcity+4+windows+10+download, which is likely used to redirect users to a malicious download or exploit. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a malicious intent.

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/strik?utm_term=simcity+4+windows+10+download PDF link annotation
    • https://waramexebogod.weebly.com/uploads/1/3/1/8/131856917/sifililesafe.pdfIn PDF document text
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/wavadixufobim_galenaporotiw.pdfIn PDF document text
    • http://jalukilesojed.22web.org/peter_question_answer_game.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/jetigosusatofatem.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/55208127447.pdfIn PDF document text
    • https://jokunotewe.weebly.com/uploads/1/3/5/3/135314966/vifami.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/8421169.pdfIn PDF document text
    • https://jadamoxor.weebly.com/uploads/1/3/5/3/135344742/wofuw_sazinalar_pewikoxi_kituxijozo.pdfIn PDF document text
    • https://jofanota.weebly.com/uploads/1/3/2/3/132302765/sotawuw_xidadevigugubog_fekowadoguler.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lonesopuw.onlinewebshop.net/bubuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33262c54-25fc-469d-b9be-d704742c1187/what_intermolecular_forces_are_present_in_hcl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bb3a62-e5cb-4050-97db-0e38cca34096/munkres_topology_solutions_chapter_3_section_23.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/free_nasb_bible_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/21847576510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc7f614-8703-418f-9a04-5102d0ad304a/is_cyberpunk_on_ps5_better.pdfIn PDF document text
    • http://pixutixiziv.epizy.com/good_carbs_list.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/72050066890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faae4214-7c9b-4fe9-a72b-8471ddebc928/64700588405.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/75071255703.pdfIn PDF document text
    • http://dofiruser.epizy.com/texas_buyers_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5572260-7da1-4369-b1e5-f309a3be842a/programmable_logic_controllers_an_emphasis_on_design_and_application.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 5240 bytes
SHA-256: 1e7bfaabcd4551544db75f1e2c2604e1e10e76c77666cf6211c0643e3cc4dd64
font_01_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 10432 bytes
SHA-256: 81ffd7ceffc625b932ad7830bc8ad6dc81972eb087f8c20e67eba1d883b6c987
font_02_sfnt_off00012c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361