Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e677af33a440fa…

MALICIOUS

PDF

73.4 KB Created: 2021-02-12 18:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9619b13a83710ed949c1bb2a3ed6fd03 SHA-1: 739c64ff81d4f636d39f579fa3e7595c376e0a30 SHA-256: 20e677af33a440faf75dab5c482e281dd5b12ceab98e5b50714c39a565749b6e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=manualidades%20faciles%20con%20papel%20de%20seda PDF link annotation
    • https://gozerivolese.weebly.com/uploads/1/3/4/2/134265833/tupudejelizuxiduwo.pdfIn PDF document text
    • https://nofitipofawotuj.weebly.com/uploads/1/3/4/0/134012335/2740719.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/LtZqgfY/arcade_roller_coaster_simulator.pdfIn PDF document text
    • http://sadanojigoma.22web.org/punctuation_worksheets_for_class_2.pdfIn PDF document text
    • https://jisawawaxiwibes.weebly.com/uploads/1/3/1/6/131606947/5217179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5fda5a7a4de99.pdfIn PDF document text
    • http://guwunewuwujulat.iblogger.org/bubivolemipedazupoxexado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabizazixivak.epizy.com/31248881890.pdfIn PDF document text
    • http://gevorewububew.epizy.com/sri_devi_bhagavatam_telugu.pdfIn PDF document text
    • http://tufobiwileke.rf.gd/rorikurenogugagivofo.pdfIn PDF document text
    • http://tebexuvizo.rf.gd/it_wasn_t_me_song.pdfIn PDF document text
    • http://wakurenup.epizy.com/saudi_arabia_visa_application_form_singapore.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_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5056 bytes
SHA-256: 375ce7451f138a6138d6ff91b5a8ceecf1b2255d6a4f8f1794f4fc92d9bb6445
font_01_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 10700 bytes
SHA-256: 854998d51b6153984e71895f39c4919f5f50a0ad6886b3e94f618ea8a21a1246

Open this report in the interactive analyzer, or submit your own file for analysis.