Malicious PDF — malware analysis report

Static analysis result for SHA-256 635498763edef6d8…

MALICIOUS

PDF

70.6 KB Created: 2021-02-22 17:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ed95941835ea427875e65ee49400dc9c SHA-1: a06abef1f1a05e917214e1993768c4b8b14581d7 SHA-256: 635498763edef6d8702e9b065c31287bc7823d1188ea68cd3b105495a6edd1ba
96 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 embedded URL, https://maypoin.ru/wix?keyword=noah+webster+school+mesa+arizona, suggests a phishing or redirection attempt, likely to deliver a secondary payload or lead the user to a fraudulent site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=noah+webster+school+mesa+arizona PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377678/normal_5fe21ea5f1a74.pdfIn PDF document text
    • http://fruit-ita.fun/2020_calendar_with_federal_holidays52dug.pdfIn PDF document text
    • http://newser.site/tefsir_kitaplarC4B1_indirs072y.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/jcwnZie/singing_machine_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/gpHbibg/ice_hockey_keeper_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/rakujolo/adgdinV/37565542903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_6012fb7631eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409239/normal_6013592698231.pdfIn PDF document text
    • http://kepuvofege.22web.org/bluestacks_2_native_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/fomavulobet/J2RVijk/wobep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365525/normal_5ff251ee28fb4.pdfIn PDF document text
    • http://tesar-krd.ru/xanoxbdnno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366018/normal_5fe4fe91d49c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC120 5080 bytes
SHA-256: 09459ec1fcdf8df8c7f69315107c848a10587f775e1417fcfb2e508ce33f2ff9
font_01_sfnt_off0000d256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD256 14672 bytes
SHA-256: ae70d90210fb6652822c6c9657b8b443a8870d6c6aa51b80785a5064689b4758
font_02_sfnt_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.