Malicious PDF — malware analysis report

Static analysis result for SHA-256 6186a30eada49f18…

MALICIOUS

PDF

85.3 KB Created: 2021-04-11 01:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8f9b4ec365fc0f58fbda0c1a59852676 SHA-1: df432f34b56186dfc57bafe5320b8dfd86203fc8 SHA-256: 6186a30eada49f181f60695f4c6569d1487a06b21ffebf177417174dded0cf73
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'dugedepap.ru', suggests the document is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a pattern of using disposable hosting for link farms, a common tactic in phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=a+breath+of+snow+and+ashes+paperback PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454547/normal_5fcd88e9ca99a.pdfIn PDF document text
    • https://cdn.sqhk.co/tafolaku/gba9idN/9747598320.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/3iewhic/radial_nerve_examination.pdfIn PDF document text
    • https://cdn.sqhk.co/pakelabete/Hlhbge3/ping_pong_pro_vr_ps4.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/beam_deflection_equations.pdfIn PDF document text
    • http://manovina.mypressonline.com/1835798975.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/rorenilebiligapawifovajo.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/70779975516.pdfIn PDF document text
    • http://50offstore.pro/5364178353bfaak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379984/normal_5feff09c0ff55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fcbe9eba2696.pdfIn PDF document text
    • https://cdn.sqhk.co/dowamagova/ijiixjg/amazon_video_player_app_windows_10.pdfIn PDF document text
    • http://onsideball.info/723945737693l8ec.pdfIn PDF document text
    • https://cdn.sqhk.co/kesusevuzep/hiahghh/fakogivipapamudivut.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/10085f72-d30a-4ba9-87dc-110b9d0b3893/6552716418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a5c53b-adb2-4c7b-9ac5-ca266000f9b3/naval_correspondence_manual_point_paper.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/battle_royale_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c204a0e2-69b1-4d3f-940d-7a0dc34d4757/66534552842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbc9521-5db6-4b15-a4a8-124b6ef32105/evenflo_advanced_triumph_lx_walmart.pdfIn PDF document text
    • http://dufojamimusim.atwebpages.com/how_to_find_z_score_on_ti_84_plus_ce.pdfIn PDF document text
    • http://varirojemixu.myartsonline.com/the_traditional_bowyer_s_bible_volume_1_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c02f272-c18f-4625-948a-df703949bff1/how_to_calibrate_vizio_4k_tv_m_series.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_off00010ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA6 5496 bytes
SHA-256: a0b6aa99bdabb1b0a67f6321198c9f5446ab8a5f41c7925e815dab76ecfcfea0
font_01_sfnt_off0001215d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215D 11168 bytes
SHA-256: e6ff3efde6dd4d051a1ca812eda358e04b15f1065a770c8a20744e6ce31da2c3