Malicious PDF — malware analysis report

Static analysis result for SHA-256 563860c6b4f14d71…

MALICIOUS

PDF

71.0 KB Created: 2021-02-14 14:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 40a06b6725f20175d65bb2b5021443a3 SHA-1: 3ac66b4e3b3c33867c86c619124f5f70432f16df SHA-256: 563860c6b4f14d71677e3b981a651cdc9e76ec3705c2f4d5f52a57ad2c908cfb
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a site offering 'how to hack dragon city android'. This, combined with heuristics indicating a link farm on disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature.

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 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/wix?keyword=how+to+hack+dragon+city+android PDF link annotation
    • http://bonuwefuganagus.22web.org/sufugapanuvo.pdfIn PDF document text
    • http://e-sparks.ru/gesatuzunoworovomeredanxrbj9.pdfIn PDF document text
    • http://sallles.ru/ableton_software_free_full_versionqph8f.pdfIn PDF document text
    • http://klokisik.space/blue_chickens_stardew_valleyoljwu.pdfIn PDF document text
    • http://cosmicgig.com/word_cookies_cheats_daily_puzzle_2020g7l3x.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/bVMFjeB/gambero_rosso_di_mazara_crudo_ricette.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/ihih21f/9800109155.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/f7Wgkjh/drag_battle_racing_mod_apk_revdl.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/brief_publicitario_libro.pdfIn PDF document text
    • http://musofiron.ru/genejovojog9x8ot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dugupafado.epizy.com/80711033713.pdfIn PDF document text
    • http://mimojududike.epizy.com/college_football_picks_week_5_bleacher_report.pdfIn PDF document text
    • http://zuvemodu.rf.gd/3_column_brochure_template_word.pdfIn PDF document text
    • http://bawibas.rf.gd/northlink_college_application_form_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 5208 bytes
SHA-256: dc6fe95c530cd0ef1b0e15b93d1b8849e4d2c4d817557a10e3e806f0e859f2d8
font_01_sfnt_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off0000ea86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA86 10528 bytes
SHA-256: d03e2491b55844533c41d6639520a0ef44d47a12bf0cc13aea86fe2c3944526e

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