Malicious PDF — malware analysis report

Static analysis result for SHA-256 2deaf121260f1071…

MALICIOUS

PDF

83.4 KB Created: 2021-02-24 21:32:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 29d2be84eb896a8111adb176b56acf5e SHA-1: aca64f2cc51eb34b6ef84292049090462e03c980 SHA-256: 2deaf121260f10713989389ca076be71ffbd5039913317c2906f6491a2747bf7
116 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing attempt. The document body, though partially corrupted, suggests a lure related to academic proposals. The embedded URL, https://jottigo.ru/123?utm_term=how+to+write+literature+review+for+research+proposal+ppt, likely serves as the primary redirection point for the phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://jottigo.ru/123?utm_term=how+to+write+literature+review+for+research+proposal+ppt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384296/normal_602e36fc172d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_602b96ad788c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_6032766429fa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372967/normal_5fdd2ec9a966d.pdfIn PDF document text
    • http://krokoboko3.xyz/614297933857cpf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859805/normal_6035b5147c3cf.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/cjgp4r4/jedewewenixadidozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_602ef93b65d92.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/dfYyzia/difference_between_lean_startup_and_business_model_canvas.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/nphalQS/hide_or_hunt_minecraft_server_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/zYIia3v/powigevomemojuno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kujesulad/lagu_alangkah_indahnya_dunia_kurasa.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/12964809726.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/jitigejopisat.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/ziferoxataku.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/jopimatojokalilidumav.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/60190329269.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_off0001098c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 5216 bytes
SHA-256: 7caf035b9ebaa8545ecc62c1dcddedb482ca9afedbab3c2e1d68a1fb6ef5939e
font_01_sfnt_off00011b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5C 10692 bytes
SHA-256: d3521c93ca8af22031d29a4e56840604dd49a8d63c866cf1fc724ed9985a2fba

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