Malicious PDF — malware analysis report

Static analysis result for SHA-256 017b49adcecdb5cd…

MALICIOUS

PDF

86.0 KB Created: 2021-02-10 21:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a21344570c9451ad7da65d293d59b85f SHA-1: e027ba66430c0678d5644a01028fb8d7838b0187 SHA-256: 017b49adcecdb5cde36c4fa4ab24788c4bbf596671d87fbda985f7cd86cd8efd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one notable URL pointing to maypoin.ru, suggesting it functions as a link farm. This behavior aligns with phishing or malware distribution tactics, where users are directed to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://maypoin.ru/wb?keyword=xamarin%20forms%20bitmap%20to%20byte%20array PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382420/normal_5fe3f21318101.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/gheidyb/best_dixie_horn_for_truck.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5fc6282553f69.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/Tcjjjdv/62773728351.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/ii1LjaH/bevazesusek.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/jgdgf6i/24325378951.pdfIn PDF document text
    • http://kijorifoweb.22web.org/47516875805.pdfIn PDF document text
    • http://mekapetakosa.22web.org/87018540070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5fceb0370e8b1.pdfIn PDF document text
    • http://kihepc.xyz/mojaradezixekiwupegodix0fi.pdfIn PDF document text
    • http://eurofamily.pro/gewivunugubupufawujawegopj2u6.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/bStOtqp/misobagobesiwef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dazulenaredon.rf.gd/pewovobit.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/livros_de_acupuntura_auricular.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/folifigosemoxagole.pdfIn PDF document text
    • http://pojetol.epizy.com/38595108726.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/sukunonizosuja.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/55839139672.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/swimming_costume_design_template.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 5236 bytes
SHA-256: fdeae8539112f161ef1b58836ec29e28673ac78b1993f5e19f0e66014803f019
font_01_sfnt_off000101fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 11904 bytes
SHA-256: 73bbde25a06073924e8e8aad5dab13e4226f6b853b8272925dbbe567ee6a1ea7
font_03_sfnt_off00013383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13383 16964 bytes
SHA-256: ae5d000e7ef565f6d38f07196a06d2a3abc888af674b4fc3923c47bcf6929ec8

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