Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd2b734899a3b01…

MALICIOUS

PDF

85.1 KB Created: 2021-05-10 16:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0c886568fa0f84bb27019025a1094b26 SHA-1: 4a1ac243171919007f3e32e061f6ed428fac4a77 SHA-256: dbd2b734899a3b01c4291191501897f3789f0bfd3e4e50ade6be250f6a866f94
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('dugedepap.ru') that is flagged as external. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily garbled, contains remnants of the URL, suggesting a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=how+to+replace+jandy+aquapure+1400+cell PDF link annotation
    • http://modernstyle.pro/nebuxifamefosughq0rc.pdfIn PDF document text
    • http://fofoketezifofi.22web.org/boral_plasterboard_installation_manual.pdfIn PDF document text
    • http://logvoz.ru/eckhart_tolle_power_of_now_summary1f1u4.pdfIn PDF document text
    • https://cdn.sqhk.co/kamavedes/gRhcFsD/43577011812.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/jhhfXz5/best_bingo_number_generator_app.pdfIn PDF document text
    • http://wewonuzux.22web.org/ruxamad.pdfIn PDF document text
    • http://nenavukatebofaf.22web.org/leading_curriculum_development.pdfIn PDF document text
    • http://homeolimp.com/36251392641svlx6.pdfIn PDF document text
    • https://cdn.sqhk.co/tazarufavixa/mjdafPk/callaway_mavrik_hybrid_headcover.pdfIn PDF document text
    • http://tezatigobupuvu.22web.org/another_brick_in_the_wall_part_1_tab.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/idhjggN/duviwefozefuxivesezuwuga.pdfIn PDF document text
    • https://cdn.sqhk.co/sufajezugi/bkideji/33843473007.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/timituvupame/4k_video_player_apk_2019.pdfIn PDF document text
    • http://jerovobaba.rf.gd/idealist_theory_of_international_politics.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/h_pylori_treatment_guidelines_pediatric.pdfIn PDF document text
    • http://bumotelaladu.epizy.com/hp_envy_4500_connection_error.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/wuvugotugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547abe08-77c3-41eb-a7c7-10c74af04aa8/tidibajixiwotilafibam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06d1cf6-257c-4fe7-9799-acd9a1767ef9/voselewitulexesol.pdfIn PDF document text
    • http://xukosebufeli.rf.gd/16470527567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a750dae2-edc5-4c51-bb22-a7c72fc870a0/45821067295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8474349b-b1b6-4e33-8e38-777d2c01776c/how_to_write_a_paragraph_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/68369876409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba68c0cf-85fb-47b8-b839-fa1370554fad/53444704283.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_off0000fcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCE 5360 bytes
SHA-256: 310c250d9c3bf5c2ff82ec591963c901c67fbd1121d29ccec2c1c4a1544b3ef1
font_01_sfnt_off00010f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F35 12260 bytes
SHA-256: 410e81ca290e9060fda7f95e44b6e62faff627810f452b36da3d503ad729189d
font_02_sfnt_off000138b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2