Malicious PDF — malware analysis report

Static analysis result for SHA-256 6173d410900c580a…

MALICIOUS

PDF

76.5 KB Created: 2021-01-29 21:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d07bde39227566b5ff863ee36038c4ed SHA-1: 75824f79f2e5a61d648c22c9dd96fcd22dd1c520 SHA-256: 6173d410900c580a3f246012624dbbe9c7e790a3b0bd15fbb690a1b284e1a2db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'maypoin.ru', indicating a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests the document is designed to host a large number of links on disposable domains. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=principle+of+sufficient+reason+spinoza PDF link annotation
    • https://cdn.sqhk.co/baresupujar/hidijt7/disassembly_3d_full_game_download.pdfIn PDF document text
    • http://velesvoyage.ru/vezewasad5ze7.pdfIn PDF document text
    • http://bilkaita.space/russian_car_drift_apk_hile_indirzgo35.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/bic0UTp/earthlink_mail_settings.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/ihgrgdl/samsung_edge_lighting_effects.pdfIn PDF document text
    • http://winoraama.fun/xalowipewulcd88r.pdfIn PDF document text
    • http://autolombardpro.ru/kenapa_file_manager_not_responding_windows_109ze2m.pdfIn PDF document text
    • http://bogplaktnc.fun/muvofitadakenunaselotatoyhgr.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/hjjfgjm/82166569485.pdfIn PDF document text
    • http://batmbatm.ru/easy_no_bake_cake_recipes_for_beginnersiad0r.pdfIn PDF document text
    • http://compte-cmbretagne.best/apache_tomcat_install_guide8cndu.pdfIn PDF document text
    • https://cdn.sqhk.co/sulugedako/gfW6wyN/3699274108.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
    • https://s3.amazonaws.com/nilafafakem/4448203328.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/new_movies_free_2018_tamilrockers.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_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 4940 bytes
SHA-256: a71ffb582cf5aff0340296c7e1f0cae243495b36f140461accf87b3bdf9367f4
font_01_sfnt_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 11028 bytes
SHA-256: 53351c72ab5ba7180f2f63eec98ae3ed2d492b84b76db62bd0b5090e94d8f965
font_02_sfnt_off0001171a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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