Malicious PDF — malware analysis report

Static analysis result for SHA-256 89eba414010947db…

MALICIOUS

PDF

96.3 KB Created: 2021-04-10 16:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 242b456a75c1f6f153a3fb5e110a32ac SHA-1: b90df9aa20762ee65c986c62942e3dc09fbc3bd7 SHA-256: 89eba414010947db060b210ccb7b42a5850ed5c6877d8145e9e02a610113861c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links hosted on disposable domains, a common tactic for phishing or distributing malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/strik?utm_term=harry+potter+y+la+c%25C3%25A1mara+secreta+resumen PDF link annotation
    • http://kozugufasuroti.mygamesonline.org/electronics_engineering_project_report.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/stack_queue_linked_list_in_data_structure_c.pdfIn PDF document text
    • http://amorexpo.com/22959205384yax7m.pdfIn PDF document text
    • https://potezevaledu.weebly.com/uploads/1/3/1/4/131406960/5872236.pdfIn PDF document text
    • http://trynutra.shop/webonerupitu52qn1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fdf002009a8e.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/juselidebegetujisuz.pdfIn PDF document text
    • https://fazipebafutemi.weebly.com/uploads/1/3/1/8/131857540/kodexi_zexowipijetewo_xitegotag_xarogepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_5fe7d7f51b218.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/local_anaesthesia_in_dentistry_download.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/causes_of_cesarean_section.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fc61588bc5fb.pdfIn PDF document text
    • http://itmax.info/7003698368548f4.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/hotpoint_gas_oven_broiler_not_working.pdfIn PDF document text
    • http://makedctl.site/zugewamumafuwaluxubumuxh02e.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/mental_health_test.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/ddbc0e895db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_60143629a176c.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/zuwagokijunotal_didufonozid_kuxejudazuti.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/wiwuxot/crochet_patterns_for_easy_hats.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/the_crown_season_5_dates_covered.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/konkani_catholic_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/blogging_tips_for_beginners.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12381 5376 bytes
SHA-256: 7a155f6e8221a98a1b17260cb3a4929a1e63a26a1b6b66e9fac6d2fb9ba46734
font_01_sfnt_off00013529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13529 12004 bytes
SHA-256: a33ed07366fd8146748d8e53deb34eab1fd6b14b3e566c63d5e2ef97b0826eb1
font_02_sfnt_off00015c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C62 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d