Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a846aaf5cc0bf4…

MALICIOUS

PDF

74.1 KB Created: 2021-02-24 14:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9564fddb10f8b4064b4cf1dfdcb2aded SHA-1: 8923db42e7bffdf69ea4142d3e104833bf9e0965 SHA-256: 32a846aaf5cc0bf40a5fb036c4b7f7ca2e76ea487ad92ff004d07d9158ec8a14
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://jottigo.ru/strik?utm_term=is+50+shades+darker+on+netflix+uk+2020 PDF link annotation
    • https://cdn.sqhk.co/zovaratigu/jjcgegj/english_premier_league_streaming_apple_tv.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/lefom-wibewoxosuzowe-xufegewofowepe-kagizomaw.pdfIn PDF document text
    • https://zitudoxe.weebly.com/uploads/1/3/1/4/131437236/newob-gizubonot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453537/normal_603145ef94407.pdfIn PDF document text
    • https://cdn.sqhk.co/zetobazox/9UnCKTx/74374370470.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/gvVifjT/11152305578.pdfIn PDF document text
    • http://qwert-ita.fun/91721453381yl1pb.pdfIn PDF document text
    • http://tk-time.site/gemini_security_system_user_manuall526p.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/7NJPtFp/how_to_learn_javascript_faster.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/Djfhgdv/lafeziwad.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/Ahjhfd8/84788908855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5fee310cd67b7.pdfIn PDF document text
    • https://guvatezip.weebly.com/uploads/1/3/0/7/130776756/rarerodawekar.pdfIn PDF document text
    • https://febewizonobuwom.weebly.com/uploads/1/3/4/3/134311996/9eb84315350.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/dxzgcxo/9227864484.pdfIn PDF document text
    • http://avtoshtorki.shop/nabixumizepow684r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5fd7d31c9ee37.pdfIn PDF document text
    • http://dressnbuy.com/isotopes_and_atomic_mass_phet_worksheet_answers4xgjy.pdfIn PDF document text
    • https://cdn.sqhk.co/kadunila/fGu7EYv/65114633023.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/7jugjis/nitro_rc_marine_engines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/grad_school_resume_template_free.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_off0000e14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 5464 bytes
SHA-256: 3c340d0f810390f2c8add106bb44f54038c3c6e9d537fc5bfbafd6744df4c491
font_01_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 11888 bytes
SHA-256: 699931e60c7ada0012c9d9e26e8d4f5b62af2846b56a1b22a4885a7230dada72