Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d0352dc4aa6343…

MALICIOUS

PDF

71.7 KB Created: 2021-03-12 15:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3bcda54f771f54c95cff899b21adeeec SHA-1: 1a7d9f08fe433bb5054c3309fad4d818a7c7b043 SHA-256: 04d0352dc4aa63436c578b47633ff2bb9203214cd46c5a47eff13fcc84eef3e2
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and a high ML classifier score. It presents a deceptive download button and links to known malicious redirectors, suggesting an attempt to lead the user to a phishing or malware distribution site. The ClamAV detection further supports its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/award?keyword=convert+scan+pdf+to+word+document+online In PDF document text
    • http://s7hmus.org/nexajibazonutigozewazasuppzyf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_603d07f039d22.pdfIn PDF document text
    • http://ubzvp.com/descargar_after_2_espaolgl6dg.pdfIn PDF document text
    • http://grusha.space/apsara_sadhana_book_downloadeqfli.pdfIn PDF document text
    • http://dofonizil.22web.org/food_safety_news_india.pdfIn PDF document text
    • http://bigpleasure.ru/hp_stream_laptop_says_plugged_in_not_charging5cgow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_5fd711bc359db.pdfIn PDF document text
    • http://tefituguj.iblogger.org/bridge_rectifier_practical.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501479/normal_5ff3cd1dcfb69.pdfIn PDF document text
    • http://max-lifting.store/yu_gi_oh_ban_listkbo91.pdfIn PDF document text
    • http://takipleskazan.org/95861426805jz507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424341/normal_601e7db687676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_60470a71d7663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozesika.epizy.com/falling_head_permeability_test_lab_report.pdfIn PDF document text
    • http://kagewopojitij.epizy.com/coagulase_test_for_staphylococcus_aureus.pdfIn PDF document text
    • http://duzixaludu.rf.gd/assassin_s_creed_syndicate_imdb_parents_guide.pdfIn PDF document text
    • http://nezixaleweku.epizy.com/hamilton_beach_49976_flexbrew_coffee_maker_reviews.pdfIn PDF document text
    • http://medesawawolujim.epizy.com/86751151776.pdfIn PDF document text
    • http://xebizeluzifavi.rf.gd/my_airtel_apk_old_version_free.pdfIn PDF document text
    • http://wijotifiku.rf.gd/nuxavujudaxegufake.pdfIn PDF document text
    • http://fomidofuwonuw.rf.gd/reminenozivasaposuje.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_off0000dc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8B 5360 bytes
SHA-256: 6a436d6479caa8d6ced544a64cccc5943cbcaeca2bb42f00927981abbc014504
font_01_sfnt_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 10220 bytes
SHA-256: 57e8444643e5d4cb8b2117f0c8c7a5e7183cd0c7a5811dc80fa2ecaa3c795904

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