Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc0a564dae23e1e…

MALICIOUS

PDF

74.1 KB Created: 2021-02-06 05:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d65ca43f601a17d1a0ee28dd39fc591c SHA-1: 7f31aa9707bd11faa3d940f7f50af89c2ad93e51 SHA-256: dcc0a564dae23e1e666143f19bb042833ca035200ed909a7b53e5a295d8e48f5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The presence of external URIs further supports this, as the document likely directs users to these potentially harmful sites.

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
  • 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.
  • 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://seumenha.ru/123?utm_term=cell+city+analogy+examples PDF link annotation
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/2338828.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/nhjaWhe/wileloluvezilaruwodijot.pdfIn PDF document text
    • http://zumedemuruva.22web.org/57739224694.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/Wugdie7/mario_kart_8_tournament_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/fMVicjf/supreme_glass_breaker_pen.pdfIn PDF document text
    • http://bidusifekinu.66ghz.com/book_about_information_technology.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/f92ade6b3cda84a.pdfIn PDF document text
    • http://nanewak.iblogger.org/acute_coronary_syndrome_management.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/40522a84a68f02.pdfIn PDF document text
    • https://jizojalagakamu.weebly.com/uploads/1/3/4/8/134886497/4fcce95b.pdfIn PDF document text
    • https://mofibowego.weebly.com/uploads/1/3/1/4/131406437/6522579.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/hdiejgh/ninja_cool_games_online_free.pdfIn PDF document text
    • https://marikiwow.weebly.com/uploads/1/3/1/3/131379510/jexisiwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexojowal.epizy.com/cavite_state_university_rosario_application_form.pdfIn PDF document text
    • http://gulazefedonijo.epizy.com/official_announcement_template.pdfIn PDF document text
    • http://vegunag.rf.gd/calendar_worksheets_for_first_grade.pdfIn PDF document text
    • http://jefiwimagi.epizy.com/tirufikukasoxetozefuki.pdfIn PDF document text
    • http://foxozokibi.rf.gd/37609599898.pdfIn PDF document text
    • http://jalovunenenema.epizy.com/guvegijuzamixibavorurok.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_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 5232 bytes
SHA-256: f666fedcb7381989f418ca944bac3c07c1343918da420ff3891cde09a522e893
font_01_sfnt_off0000f6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 10776 bytes
SHA-256: f1f54008697d3ed47bc38f923f83707616d744608ed80bb63eb2c0d8d6f4d4a4

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