Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec539369f965d250…

MALICIOUS

PDF

64.6 KB Created: 2021-01-22 06:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9bead6c196cd62f33cb8213d6744b69e SHA-1: 40b3ed8662a2abb1c6ca86e72ac75194a700c62c SHA-256: ec539369f965d250120f87996ceccfb646f8a03e47eb8026497e1f611c3b3130
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The PDF contains a large number of external links, suggesting it's part of a link farm or used for redirection. The embedded URLs point to various websites, likely intended to host phishing content or further malware. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a malicious intent to redirect users to potentially harmful sites.

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 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://jottigo.ru/wb?keyword=dino%203d%20run PDF link annotation
    • https://kowenijog.weebly.com/uploads/1/3/4/0/134096242/f762f6f.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/M1ij4ib/gravity_trampoline_fountain_park_edinburgh.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/hgTN1hg/heroic_battle_for_darkshore.pdfIn PDF document text
    • https://site-1174448.mozfiles.com/files/1174448/29974107798.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/higgUhc/deck_heroes_legacy_mod_apk_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/2LpqUYK/scentbird_for_men.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/QTthacU/vector_pinball_android.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/ftii_pune_admission_form_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/eVihjeB/89959573552.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/qhi0jdE/running_horse_watercolor_painting.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzirixowev/djkbVje/easter_cross_coloring_pages.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rotaduwifomol.rf.gd/detroit_become_human_steam.pdfIn PDF document text
    • http://sexikiti.epizy.com/sql_injection_attack_cheat_sheet.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/bibemepezonole.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_off0000c502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC502 4560 bytes
SHA-256: a779fe4a2ae411177870894b923d07bd77ccebbd0bc27c2966079b4c0f76833f
font_01_sfnt_off0000d49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49B 9812 bytes
SHA-256: 8200a4556626c903df1ff037a60de7ba10eccb2e22ef4f2f4191cb1203dc7cb7

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