Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0eea6a73d667529…

MALICIOUS

PDF

82.8 KB Created: 2021-03-22 03:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: eca4d3c2d4f335f0273b76f27195d4f7 SHA-1: 98c7dbc6f59b642ab73481349f162240c01c95e5 SHA-256: f0eea6a73d667529e98df324b768025d067b78aca2be0940d4050b22bed97713
134 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier returned a high probability of maliciousness. The presence of external URIs and a 'download button' heuristic suggests a phishing or social engineering attack aimed at tricking the user into downloading a secondary payload. The document body is heavily obfuscated, preventing a detailed analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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
  • 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://soxebez.ru/award?keyword=angaray+novel+pdf+download PDF link annotation
    • https://cdn.sqhk.co/dorejewibiz/n37jjgc/rusoza.pdfIn PDF document text
    • http://kyrgyztours.com/gugamupifigoxexatiridepi9zuur.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/yL8jhjh/bluestone_alley_piano_sheet_free.pdfIn PDF document text
    • http://neyroskakalka.site/spinal_stenosis_nhscpyjd.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/QIK0Fij/91490471080.pdfIn PDF document text
    • http://pezidibega.iblogger.org/reflexive_verbs_in_spanish_printable_worksheets.pdfIn PDF document text
    • http://akmurzina.com/mefaxokaberabetukudefurgenys.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/wijje9p/service_innovation_company_examples.pdfIn PDF document text
    • http://prizyivnik.ru/using_the_order_of_operations_what_are_the_steps_for_solving_this_expression89m7i.pdfIn PDF document text
    • http://nukadaz.iblogger.org/convocatoria_calaveras_literarias.pdfIn PDF document text
    • http://libertinemodels.com/83681557347ubcx0.pdfIn PDF document text
    • http://vuvopogawuxaxax.22web.org/chirped_waveguide_gratings.pdfIn PDF document text
    • https://cdn.sqhk.co/nubenirosife/fYchbsi/8211190061.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3008831-7bfc-4800-b03a-2820517e2c1d/schlage_keyless_entry_deadbolt_change_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c810fe80-30a1-4c8a-8d28-594a4c9c10c5/mysql_for_beginners_-_self-study_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1905cd9b-b0ed-41af-abe1-41892f67f9aa/gdpr_what_is_processing_personal_data.pdfIn PDF document text
    • http://jekidosokun.epizy.com/59158371974.pdfIn PDF document text
    • http://sepuxukejobome.epizy.com/visufapivekizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2e7064-a1b6-4088-a637-bba5c030e463/how_to_write_a_single_paragraph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a873dd-d805-4a23-980b-04f75d778437/16033623649.pdfIn PDF document text
    • http://deketinak.rf.gd/gugesedosufifanuxi.pdfIn PDF document text
    • http://sofikej.rf.gd/free_firewood_shed_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/116942ca-8bf1-4b8f-91fe-2d9bd9e7b7d3/paweguvinisurakivo.pdfIn PDF document text
    • http://xaxibalese.epizy.com/98261766092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e69cc9-9593-49ee-bda3-8df13ead7b8f/the_mathematics_of_the_ideal_villa_essay.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011f5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F5B 18876 bytes
SHA-256: b43ee02be490a09689ead0238a654a07fcba1146d12c86714ed4df671b493186
font_00_sfnt_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 5276 bytes
SHA-256: fd9064738c663e78fef749082763f9e70a6e3d7b2095348ce76f66aad51a0f4d
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 10324 bytes
SHA-256: e11a2558e1168e829ad0a3287ed5aecb38bc7f5150e19d88e5f0c603e0596878

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