Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ebf52b94395e3f…

MALICIOUS

PDF

74.2 KB Created: 2021-05-01 07:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b953c5f3f42b7e0df5dd6b4fba048682 SHA-1: 191bde7dec47e3bd7bb4685260542df7414b4da7 SHA-256: 47ebf52b94395e3f1cfb9700482d15f8cfc7980b7ec51974ef554a4557c8a0e4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a primary external URI pointing to a URL that promises information about Adobe serial numbers. This suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/strik?utm_term=how+to+find+out+adobe+serial+number PDF link annotation
    • http://nizavevorupuj.mywebcommunity.org/9380016446.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/business_canvas_example.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423442/normal_5fc6145fa46eb.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501486/normal_6025f07653ea9.pdfIn PDF document text
    • http://investmag.org/watawikulonukora7y1ql.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/pitelininitigotojejuv.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/82384708033.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/87949093308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fcd9fd5664ab.pdfIn PDF document text
    • http://mesikigodijope.mypressonline.com/read_batman_hush_online_free.pdfIn PDF document text
    • http://lorenbayi.com/camscanner_full_cracked_apklxvhv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_606c81de47487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_fb4c381efccc4768867e9ab1562bdccb.pdf?index=trueIn PDF document text
    • https://2634c7da-0b58-4de1-95e3-ef2217a723ee.filesusr.com/ugd/f934bc_d5f4b0278ad04258ab9d51fbada2e19e.pdf?index=trueIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_9bf1d9f8c21644f482177e8d28f94032.pdf?index=trueIn PDF document text
    • http://wesatume.atwebpages.com/vitekodanovovaxivuno.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/38634909050.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_743ce8ae7c3b44f694d324db44c35c9e.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_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 5244 bytes
SHA-256: 6a0a6a0425a9182daf5469396fdb6d22b131139dee5321951596ba0dcdea16cd
font_01_sfnt_off0000f7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E3 10588 bytes
SHA-256: 0a1372493bd93e832a4ea91580c4ccb448440da1bdd09ee404eef00fd94f8aed

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