Malicious PDF — malware analysis report

Static analysis result for SHA-256 03220e60da9dd0b2…

MALICIOUS

PDF

76.0 KB Created: 2021-03-16 04:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9dacb873c12fe6be2a038e8b40645a1c SHA-1: f30215198d11e181ee46c93ed4afa38eddb4e0d3 SHA-256: 03220e60da9dd0b2a129da2cde6164287e39540893332a364bec42944dbfc64c
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically appearing as a search result for a product manual, likely intended to trick users into visiting a malicious site. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting a phishing or malware distribution intent. ClamAV detection as Pdf.Phishing.Trojan confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/wix?keyword=ge+oven+manual+326b1016p001 PDF link annotation
    • http://new-volosi.ru/can_magic_bullet_make_smoothies1q4g7.pdfIn PDF document text
    • http://prizinsta365.website/expendables_4_full_movie_in_englishqxc3n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477164/normal_5ff1337372815.pdfIn PDF document text
    • http://vizit.store/74442863203vkcl4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_600ce51f77395.pdfIn PDF document text
    • http://siondez.ru/kuwufimixupolabalulv262q.pdfIn PDF document text
    • http://gekigevuzif.iblogger.org/what_is_iceberg_model.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368970/normal_5ff69d2824759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_973bd8c49e0246b9b7e90707d979e7a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/miduko.pdfIn PDF document text
    • http://fozabenisos.epizy.com/reading_skills_practice_test_13_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/sap_bpc_books_free.pdfIn PDF document text
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_fda61914f9884d78ade706a4d540994a.pdf?index=trueIn PDF document text
    • http://didopip.epizy.com/att_u_verse_tv_guide_tonight.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_7281a87593d84173bfb08a30ead22aab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jagux/85119934505.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_9d5b9d2eeb4e4d1f99ef1701fbd21364.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 5564 bytes
SHA-256: 61c005b68dd73d58cb1ed23199f1eb564fa94c4fa1486aa2b8778210213c20f4
font_01_sfnt_off0000fbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 11564 bytes
SHA-256: f867b0c95a2b1e936f9ad08e840fbb8955f347ef44faf49fa5bd2d963d7a9836

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