Malicious PDF — malware analysis report

Static analysis result for SHA-256 3550dd073dd78247…

MALICIOUS

PDF

80.7 KB Created: 2021-02-22 02:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3678d6d8848a684e1a180aadb2cdd190 SHA-1: e5240809270b95e8e7fb69e5033fe5d737904adc SHA-256: 3550dd073dd782472c89e1cec3cdef49556588ab360947eb9370c010263b0b1b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=melhor+curso+de+marketing+digital+online PDF link annotation
    • https://binazinir.weebly.com/uploads/1/3/4/1/134108718/noxojiwefuke.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/jegdhe2/japuz.pdfIn PDF document text
    • http://patutejugivipi.iblogger.org/3126497318.pdfIn PDF document text
    • http://gsmall.space/photo_editing_on_macbook_pro_20205uo23.pdfIn PDF document text
    • http://trixy-matrix.space/nafojemidadoiueop.pdfIn PDF document text
    • http://merovew.xyz/vipazelalojasitoxerorepu2qegv.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/fusidanogenegonosebe.pdfIn PDF document text
    • https://mojogobiwed.weebly.com/uploads/1/3/4/7/134747953/juralewoma.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/hiaCjcG/3212630393.pdfIn PDF document text
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/6e3679a43ca32.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/gdxijgg/highway_transportation_system_drivers_ed.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/ajePMhi/quest_diagnostics_portal_login.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajonagot.rf.gd/book_cover_design_free_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/worksheet_graphing_quadratic_functions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/54434027441.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/ciencias_sociales_bachillerato.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/aba_english_premium_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/pumped_up_kicks_remix_ringtone.pdfIn PDF document text
    • http://nutujetis.rf.gd/graphic_design_jobs_kansas_city_ks.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/sanijoliju.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 5424 bytes
SHA-256: 67a89c59aa9fbc08f4f874b15ab9e032ded89fabce72bcbcd9ec8dffb4bcc93c
font_01_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 13008 bytes
SHA-256: f50b059456989723bb2f8b00b5029fc70cbcbb073c31fa1399bdf2aa97259ab2
font_02_sfnt_off00011e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E87 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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