Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d930e75d6313231…

MALICIOUS

PDF

76.6 KB Created: 2021-04-18 23:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a9726ea4bff1575142f60663424bff25 SHA-1: 909f182ffbed506c880b0209ad01ae519b6e0745 SHA-256: 2d930e75d6313231c43a875cea3fa740f21d58bc7212a2438f42c2339fea63d3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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=types+of+exercises+without+equipment PDF link annotation
    • https://lexabebuwapo.weebly.com/uploads/1/3/1/3/131383838/97a265d9bd89c34.pdfIn PDF document text
    • http://zetomanebegox.iblogger.org/lagugoxibal.pdfIn PDF document text
    • http://guginegafofa.iblogger.org/it_will_be_alright_with_me_lyrics_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dirotiweze/mYXjHwP/nexovixiwini.pdfIn PDF document text
    • http://xijewaka.22web.org/pdf_search_engine_books_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_604640ba9885b.pdfIn PDF document text
    • http://joraxabe.iblogger.org/how_to_write_an_observation_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/Iicggjb/google_agenda_delen_iphone_en_android.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/0ii3fgi/74361607271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490735/normal_606e9ef2714b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_5fd97e518d5e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_602c524be6aaa.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/zawekubovopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fe75d7bc53ed.pdfIn PDF document text
    • https://piluzixalevuj.weebly.com/uploads/1/3/5/3/135345731/jejowobef_noxip_xixizedawox_fupuv.pdfIn PDF document text
    • http://fogugevup.22web.org/anti_tetanus_serum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_603eecd77235a.pdfIn PDF document text
    • http://fuzuxozexuvir.22web.org/pegejoramizedulesakowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegigofupiva.rf.gd/juxofafilunisofixebimem.pdfIn PDF document text
    • http://kubunixa.epizy.com/35275531573.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 5348 bytes
SHA-256: f544d2d04a00493604da51bb9f9a19da22a1b7f070d468c4f3f26a73a87b63cf
font_01_sfnt_off0000ff45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF45 11092 bytes
SHA-256: cd2589975b26e1f4d336b163b0c249ef427eb05522a734ee0ca999467e5221fc

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