Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf0e4102f2e24cd…

MALICIOUS

PDF

73.1 KB Created: 2021-04-11 22:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6b874fb713eb81b164a4b85936bdccca SHA-1: b17a6cfe5f5c8ebf8aa0275e0761cef4c7fecb93 SHA-256: ddf0e4102f2e24cda9bcc852712a623dd858c21c2a902d58d397bbce4359ea16
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://maypoin.ru/strik?utm_term=d%2526d+druid+spells+guide PDF link annotation
    • https://cdn.sqhk.co/tamoravuwera/ezhaZjh/89686699764.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/suboki.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/76094512921.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/gallstones_spanish_patient_information.pdfIn PDF document text
    • https://cdn.sqhk.co/gavebibi/78ozfgc/34230815425.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/materials_fabrication_from_bombyx_mori_silk_fibroin.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/27126195400.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/OiaWhjA/status_saver_for_whatsapp_whatsapp_business_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nalujisutu.epizy.com/75346362491.pdfIn PDF document text
    • http://garorores.rf.gd/74011244108.pdfIn PDF document text
    • http://risesodasa.epizy.com/tratamento_para_ansiedade_generalizada.pdfIn PDF document text
    • http://bosotosevizava.rf.gd/30913815106.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/botones_gustativos.pdfIn PDF document text
    • http://gumijodopivu.rf.gd/medicine_journal_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/how_to_apply_for_ib_acio.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/building_simulator_pc.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_off0000da54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA54 3484 bytes
SHA-256: 10b1e8ca5c1ffd40509c37c8d23269801adcfe34a1607cb54df6c3846a3e687a
font_01_sfnt_off0000e5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C1 10612 bytes
SHA-256: 5c58da23d40a73a891b90e729445de0d8aa69d0f56f8fb2f680ecb8e9c70ef39
font_02_sfnt_off00010a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378