Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fa65326608b0ae…

MALICIOUS

PDF

79.7 KB Created: 2021-03-04 23:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 71ceb95c7c1a95220add89d517ebc40b SHA-1: d173fb7bb092bd91ad50e699c858713de5b3a4c6 SHA-256: 50fa65326608b0aeedf02e18e5eadb6d823ba0536092774f75a0bd55d345fa54
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic firing points to a phishing lure, specifically using a 'free-download phishing' tactic disguised as a dehumidifier manual. The embedded URL leads to a redirector, which is a common technique for delivering malicious content or phishing pages.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/aws?utm_term=frigidaire+dehumidifier+70+pint+manual PDF link annotation
    • http://jojidasusesot.sportsontheweb.net/actiontec_c1000a_dd-wrt.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/EgiTii0/smart_button_panic_button_app.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/amazon_lord_of_the_rings_casting_call.pdfIn PDF document text
    • http://conicppjry.bid/fagipikinuvewezedoxiv90j1.pdfIn PDF document text
    • http://gumidaz.medianewsonline.com/foundations_of_algorithms_5th_edition_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/wobivada/ifjbmhf/tuwumanotisotowarotodes.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/bihJify/marketing_project_manager_salary_nyc.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/dwarf_fortress_guide_to_adventure_mode.pdfIn PDF document text
    • http://naturalgood.space/english_worksheets_for_secondary_school_studentsua3bn.pdfIn PDF document text
    • http://kesenirevapovid.iblogger.org/netflix_for_smart_tv_android.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/jolozidabi/sas_enterprise_guide_put_date_format.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/jekeweritubek.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/92696278259.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/senuwaregudoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/math_worksheets_grade_8_multiplication.pdfIn PDF document text
    • http://fafinonez.rf.gd/judakekujifodige.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/96154091399.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/18801223889.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/charity_complaints_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/delejewabiledipekevez.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B0 5452 bytes
SHA-256: e2dcc2e63fd3090391861ff7b3d94ef500e7ea8e2c1d5db5202c0de1c82ce361
font_01_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 11180 bytes
SHA-256: 31b26b6eeb33be3e1ef3d25a9efefc9bc8c859e33f99ab90af3f9790354c753b

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