Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b73357be544c350…

MALICIOUS

PDF

106.4 KB Created: 2021-03-23 09:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c026d7e20e828be15a11e7308b18eead SHA-1: eddaff075e5e36e6084e52153b0927f12e34b2fb SHA-256: 5b73357be544c35031ba6d1b20e7db487644d207e880bd1c09237d368d8f56e3
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The heuristic 'SE_CALLBACK_LURE' further suggests a phishing pretext, likely aiming to trick users into interacting with a malicious link or providing sensitive information.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/wix?keyword=can+you+get+robux+for+free+2020 PDF link annotation
    • https://cdn.sqhk.co/xurajalijok/ekQuegi/gravity_blanket_vs_other_weighted_blankets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_6050c56e9f0e2.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/1hfje1h/63857140926.pdfIn PDF document text
    • http://talakam.space/9046101873678zb9.pdfIn PDF document text
    • http://talemine.getenjoyment.net/bararofefu.pdfIn PDF document text
    • https://golewobewawir.weebly.com/uploads/1/3/4/3/134350879/siwunalelusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406191/normal_5ffc20ac599eb.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/rasedav.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/spotted_lanternfly_honeydew_removal.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/f2geOjf/best_twitter_app_ios_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/sexasegavon/ceKpjbs/8709792400.pdfIn PDF document text
    • http://ilkertr.shop/pinagesebezewekajalugixubh6tfw.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/6971638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_6007d58844c1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5fcd3647f22ef.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/eUdiehf/papa_s_pizzeria_to_go_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wurebosuloxu.myartsonline.com/jodibaragesot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f0cd0e-905d-463b-ba4c-9b715a878038/23971126758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72736217-0e8a-46a9-ba35-53f32322f0bb/gafegamoborikume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33960bd2-0f34-4b70-a904-eece20a73f76/60172671024.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_off00015f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F5F 5216 bytes
SHA-256: f8fe0c6de9b646d442f656c9a9f6a6c0ee8268f7dff723de048e8aa5735ac360
font_01_sfnt_off00017140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17140 12596 bytes
SHA-256: 7196f4ffbabd9caa181bd3604eb5707bb2817b41fb86ce9cdc7d85f0f3930e3b

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