Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0a0908382646c4…

MALICIOUS

PDF

77.2 KB Created: 2021-02-20 17:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3dc863c7b211f1a4fda1214257436e62 SHA-1: 2f67d50b1c1a28df8b1ca57e723a1a3433cc3b31 SHA-256: ad0a0908382646c4b81bba10faebe1c2125cbe01a468cdd571b61d0a30ca4cdb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the ML classification strongly suggest this PDF is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/aws?utm_term=garmin+g600+manual+pdf PDF link annotation
    • http://universityru.fun/620073310768dwji.pdfIn PDF document text
    • http://idealica-columbia.site/8389322893dzray.pdfIn PDF document text
    • http://pushbiz.fun/chirutha_movie_songs_free_320kbps9qay3.pdfIn PDF document text
    • http://7gusevshop.website/barske_stolice_forma_ideale06bh8.pdfIn PDF document text
    • http://liolika-rsya.ru/destiny_summoner_tier_listbwr16.pdfIn PDF document text
    • http://topchambre.xyz/divisibility_worksheet_5th_gradenjsfr.pdfIn PDF document text
    • http://ig-soft-team.com/photo_editor_android_app_githubxwck3.pdfIn PDF document text
    • http://teren.fun/block_craft_mod_apkpwyrp.pdfIn PDF document text
    • http://complerbnp.com/10276179637tllwu.pdfIn PDF document text
    • http://esclick.pro/screening_for_breast_cancer_guidelines_acro2x4y.pdfIn PDF document text
    • http://avit0.pro/izoelektrik_nokta_nedirhmexp.pdfIn PDF document text
    • http://g2am2e.xyz/introduction_to_programming_in_java_an_interdisciplinary_approachuw7bw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vunizi/finazu.pdfIn PDF document text
    • http://xupasafagimi.rf.gd/69228335296.pdfIn PDF document text
    • http://zazuxidavo.rf.gd/apsrtc_bus_pass_application_form_for_ngo.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/pioneer_sph-da120_not_turning_on.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/fabipezinevar.pdfIn PDF document text
    • http://nagofubufi.epizy.com/6_point_pocket_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/weather_report_islamabad_next_30_days.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/bottom_navigation_view_android_for_multiple_activities.pdfIn PDF document text
    • http://kusotuwomaru.epizy.com/back_to_my_roots_lucky_dube.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_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 5512 bytes
SHA-256: 710d5d2dbcb8f2cb872128297a4d0e314898e36ad4f1c0b016e90d7919a1949b
font_01_sfnt_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 10688 bytes
SHA-256: d14ba124910ee199692ea9b126056c269072ebc6600f836a30439e4072105f63

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