Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb88cd49f9599d1…

MALICIOUS

PDF

91.2 KB Created: 2021-04-05 00:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 87b2a28d3a968ab9797c92cf19eb09c2 SHA-1: 0864b1ef69f4d4d90c750bb6ee63df40ea4aae7e SHA-256: 1eb88cd49f9599d16ceff72ca940c8c560e4f5e5d9ad3c69b86540b5f2dc7b2d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/award?keyword=cech+cohomology+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380079/normal_603506d044885.pdfIn PDF document text
    • https://jewepixixa.weebly.com/uploads/1/3/0/8/130814248/6525305.pdfIn PDF document text
    • https://buvaranugabenu.weebly.com/uploads/1/3/0/8/130873820/8815956.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/jigdifZ/xomerajelojoripovo.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/85033507344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_6046664f5c3c8.pdfIn PDF document text
    • https://ketesepirexutub.weebly.com/uploads/1/3/5/3/135306065/3fef0e3.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/jgF1gih/zara_larsson_wow_lyrics_deutsch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_6033cd794e676.pdfIn PDF document text
    • https://woxufojobufuv.weebly.com/uploads/1/3/0/7/130739326/julizolumilevuxeli.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/belong_to_you_chords.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/how_old_are_the_riveras.pdfIn PDF document text
    • https://cdn.sqhk.co/sejaganetaxa/h0KbyzW/o_launcher_2020_apk.pdfIn PDF document text
    • https://xoluvaxabezil.weebly.com/uploads/1/3/4/3/134338990/kinovanoju-gipasa-lixib-marade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_605dba418255e.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/bhiuCMU/werukugefurenipimabelarus.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/WhhjcX9/33088358537.pdfIn PDF document text
    • https://jakuxilo.weebly.com/uploads/1/3/4/7/134711712/765686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://purarugamepamak.epizy.com/criminal_defense_attorney_dallas_free_consultation.pdfIn PDF document text
    • http://neloralo.myartsonline.com/formulae_and_tables_for_actuarial_exams_2nd_edition.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/nios_deled_assignment_cover_page_download.pdfIn PDF document text
    • http://nesuvumuvugelo.epizy.com/telephone_icon_for_business_card.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/80552912356.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_off00010a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A04 5092 bytes
SHA-256: abe44bdc99df50228161e8a7a457cd5e2b337b3bb7c2467c3ebc6d25b0e12097
font_01_sfnt_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 12836 bytes
SHA-256: 6ced801a34bc4225734afe8f8b418225ee8b804f8d5a8a883e98d29005b86bb6
font_02_sfnt_off00014711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14711 16956 bytes
SHA-256: d279f61ee611a3812733e7c15437268f61e8946d21ea69f91f4a63df30c9d4d4