Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eedfecdd59729f0…

MALICIOUS

PDF

83.4 KB Created: 2021-04-07 08:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 24145d67f5515748d743190b429b2dce SHA-1: d7b8675d74e9fd06c7e1f094d6fe7b316114b128 SHA-256: 1eedfecdd59729f077962780a89b46deaf70077e74ed4e644816527c65b7302b
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/award?keyword=wondershare+pdfelement+ocr+plugin+portable PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391000/normal_5fc7c6ee9ff59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_6068c19b57fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481990/normal_5fd11658e7087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_606bd887e7333.pdfIn PDF document text
    • http://jesiwufap.iblogger.org/vba_ms_word_open_document.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_60246386aac3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_6049534e01c16.pdfIn PDF document text
    • http://delozofize.scienceontheweb.net/12300371043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_601152c16b739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_6047f935982f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kumagubugudaxu.rf.gd/teoria_finalista_del_derecho_penal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af13e365-1403-4cc5-9c93-a9d44c5c219f/graphic_design_portfolio_layout.pdfIn PDF document text
    • http://segixof.epizy.com/42496781890.pdfIn PDF document text
    • http://zilapiwet.epizy.com/gakejo.pdfIn PDF document text
    • https://2cfcb734-ec62-4cd9-b61c-03d4762ad765.filesusr.com/ugd/a891c0_bc179b28a51848c0b89c3af61989df39.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/efed5898-8fac-4872-a4e1-065b237ba059/9512269880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72151f18-3d2f-4721-9b5d-13f2f6fcb409/vofenutikuz.pdfIn PDF document text
    • http://rigidafavubo.myartsonline.com/christmas_carol_book_sparknotes.pdfIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_aa6ef50e8f024ba79703af3ee8906279.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 5724 bytes
SHA-256: 4203c474747d7a32b1be7044fb78984b3c51214d6148a22109c3ff885a33d120
font_01_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 2044 bytes
SHA-256: e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af
font_02_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 11416 bytes
SHA-256: c495b9baa3fce624f2a924d7335b69de679a0550288561940e8ff8e7355d4110
font_03_sfnt_off000129b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B4 16304 bytes
SHA-256: 334a632046566dba1e13aa2ad28522ffc4701ff005b1d667d8ded0e84145bcf3

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