Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a5463dc2d2ea49…

MALICIOUS

PDF

80.1 KB Created: 2021-01-22 19:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7e03f83245a0ed8d37cb2f00b4fdf618 SHA-1: 56bafd58b29ec1afa6befb0b055d28f343c80a81 SHA-256: 10a5463dc2d2ea4950d3b65d12e2ad12cde6d043a3d9d4f6bc870aa401e676f6
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains references to a "plants vs zombies 2 hack apk no cooldown", a common lure for phishing or malware distribution. The presence of embedded URLs and the overall structure strongly suggest this PDF is part of a phishing campaign or a distribution vector for further malicious content.

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://leonvi.ru/123?utm_term=plants+vs+zombies+2+hack+apk+no+cooldown PDF link annotation
    • https://site-1175198.mozfiles.com/files/1175198/8721779868.pdfIn PDF document text
    • https://site-1173368.mozfiles.com/files/1173368/vofolasuvaboxekoduxiwini.pdfIn PDF document text
    • https://site-1175083.mozfiles.com/files/1175083/dictatorial_government_crossword_clue.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/pimop_zefizagilufojid_xodakes_xadetegedor.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/jgRADia/28710219818.pdfIn PDF document text
    • https://site-1172822.mozfiles.com/files/1172822/56244636812.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/1768050.pdfIn PDF document text
    • https://site-1168413.mozfiles.com/files/1168413/wolilokamegujadola.pdfIn PDF document text
    • https://site-1198015.mozfiles.com/files/1198015/cinemark_ecuador_village.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/dixamogijone-wetegatefonite-nidufovutazikik-pugebe.pdfIn PDF document text
    • https://site-1220496.mozfiles.com/files/1220496/widebenuxewuxojixujukuz.pdfIn PDF document text
    • https://site-1177911.mozfiles.com/files/1177911/amfori_bsci_platform.pdfIn PDF document text
    • https://site-1167993.mozfiles.com/files/1167993/certified_teacher_assistant_salary_nyc.pdfIn PDF document text
    • https://site-1246802.mozfiles.com/files/1246802/usaid_1420_biographical_data_form.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/tosevud/java_7._81.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/bangla_medicine_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/writing_linear_equations_practice_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 5756 bytes
SHA-256: 17a6a91f466c845a2d8af37e61ef44258940a222787639ff48bdf66374953c65
font_01_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 10612 bytes
SHA-256: 9cf6787b7af7a163a8362cbe486dd0e4758c302d7c312afbecee9a9d34aa3ab6
font_02_sfnt_off00011c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C30 16592 bytes
SHA-256: ff502330f92e9426b693df6ff388d1a7413aa6621a33a30cbd633295b116079f

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