Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ad3b1503ac180c…

MALICIOUS

PDF

69.3 KB Created: 2021-03-13 18:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d9ba7c20fe46083e3d83f202ec3ac417 SHA-1: 5c1f8a8a4f6c26db22ee654cf459ba4ebcb3d094 SHA-256: 89ad3b1503ac180cabfa7db6b33719e1367a448ca92e262edc3ee22e8ffe5c99
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/strik?utm_term=ejercicios+con+verbos+irregulares+en+espa%25C3%25B1ol PDF link annotation
    • http://latomixoxa.iblogger.org/how_to_get_free_songs_for_imovie.pdfIn PDF document text
    • http://hookup756.fun/toyota_camry_2020_tokunbo_price_in_nigeriaz47la.pdfIn PDF document text
    • https://pujowelitolav.weebly.com/uploads/1/3/1/4/131438356/fifebimibiwepiv.pdfIn PDF document text
    • https://bagosuberabuvi.weebly.com/uploads/1/3/4/6/134681771/dc4f6e9e6e.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/haier_air_conditioner_owners_manual284ts.pdfIn PDF document text
    • http://freefire-gifts.com/gowanozinaxui5m2i.pdfIn PDF document text
    • https://cdn.sqhk.co/muwesisokim/fNjhABQ/nijupetav.pdfIn PDF document text
    • https://namavikevak.weebly.com/uploads/1/3/2/7/132740743/belakefigotena.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/Z6pB4u0/dungeon_hero_raid.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/215RXt2/kexokapemevasopimaf.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/543714538760oemn.pdfIn PDF document text
    • http://insta-sale.site/32486062445006tj.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/pipaxovibelira.pdfIn PDF document text
    • https://mulodetudujidof.weebly.com/uploads/1/3/5/3/135325190/kurukepokimen.pdfIn PDF document text
    • https://metifipiwe.weebly.com/uploads/1/3/1/1/131164131/830fdfb422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2e2daf-4ed8-4ea7-8a21-5f1feaa88ceb/alpine_iva-w505_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb9e905-6135-4d7e-b63e-a90533929b5a/samsung_aircon_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0769de-5480-4c49-bc54-055d1d60ec06/does_apple_still_support_ipod_touch_5th_generation.pdfIn PDF document text
    • http://gizogebinide.rf.gd/topics_in_audiovisual_translation_pilar_orero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd46fc6-3787-440d-894d-746040235ee2/mofimeraxano.pdfIn PDF document text
    • http://lukarimavelo.epizy.com/human_barbarian_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0c610e-5ef7-45c7-9969-3127c5015bdc/64047092117.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_off0000cd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD69 5544 bytes
SHA-256: 3f0997804f88ece7b687a4a1473f911dd7fb839ff9a633d4632d91c4ef677f0f
font_01_sfnt_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 11452 bytes
SHA-256: f0854ba4589656114920d488b6554089ace3a73606106fc410fb8698be11d21b