Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d64d8946d45589…

MALICIOUS

PDF

73.2 KB Created: 2021-03-03 06:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 018dab4dc35bf4fa725ba1c3953ed914 SHA-1: 9d31f4633fa7903a499f9ab179085c12dc321875 SHA-256: f7d64d8946d45589a34f209c9a1a10dfb972be6f1b2453948603a8e821750311
66 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs pointing to suspicious domains, indicating an attempt to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external links on disposable hosting further supports this assessment. No scripts were extracted, but the embedded links are sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://midufefew.ru/wix?keyword=swan+meaning+symbolism PDF link annotation
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/5949699.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/7868822.pdfIn PDF document text
    • https://patinijogu.weebly.com/uploads/1/3/4/8/134854147/2435680.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/gieZNQA/80874525791.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/8931801.pdfIn PDF document text
    • https://xapotitiguwux.weebly.com/uploads/1/3/4/6/134668809/d1ca3e6.pdfIn PDF document text
    • https://fesifikigit.weebly.com/uploads/1/3/5/3/135319823/41c591c.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/heat_transfer_jp_holman_solution_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/khibhjH/4785690673.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/7372175.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/fhcEnha/30119477598.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/timogiwajabox_petufirejimefe.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/vuxagixil/adding_mixed_fractions_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/top_blog_templates_wordpress.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/what_is_esl_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/jefabewisovekitusetika.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/sonicwall_tz_105_installation_guide.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_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 5348 bytes
SHA-256: 0451196a32fd34ce46463ad792402ef6773a657096f9caf116201993eb777ea1
font_01_sfnt_off0000f41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41A 10104 bytes
SHA-256: 61c6bec0c6726c225ebc320cd1eef9d09a3ccaf20c6637778aa9ac0a2b6d5c92

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