Malicious PDF — malware analysis report

Static analysis result for SHA-256 df03468329e2125c…

MALICIOUS

PDF

78.4 KB Created: 2021-04-02 05:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a58dcc165765094f8cab584330f5ada0 SHA-1: 34545c8ab7aa873837d4a4f12701b54d9dfba2e4 SHA-256: df03468329e2125c85058a451f9547756311190480895df54a4bd6352b72584f
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers as malicious. It contains an embedded URI pointing to 'ponafet.ru', which is likely a phishing or malware distribution site. The document body is heavily obfuscated and appears to be non-readable content, suggesting it's designed to hide malicious intent rather than convey information.

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://ponafet.ru/wix?keyword=dwight+schrute+meme+angela PDF link annotation
    • http://kawlites.online/273832529476w0uk.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/subugapotevexov.pdfIn PDF document text
    • http://chestlune.online/56012067662l7oxd.pdfIn PDF document text
    • http://retys.space/sky_factory_mobilepdryo.pdfIn PDF document text
    • http://blubadgehelp.net/pamorakpguti.pdfIn PDF document text
    • http://zedateve.mypressonline.com/workforce_planning_definition.pdfIn PDF document text
    • http://polfact.site/rizakovogovokuwenujolexogjyg39.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/midaguvimabof/how_to_remove_navigation_bar_android_pie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cef8596-3020-4bbe-9eab-e87f6e58ee0a/is_little_red_riding_hood_a_fairy_tale.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/51239200368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f66a630-cd6d-4001-9784-c3c7d43afaa4/wd_my_cloud_setup_remote_access.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9403685f-8c25-4e9c-8a83-2a6faf574d1a/72234609999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da1241f-029d-4fb7-b7cd-dd8d9f21e03b/65386930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd1a021-01a8-4f22-ac17-30aef54c6643/mapa_de_riesgos_de_corrupcion_alcaldia_de_medellin.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/assateague_island_fishing_report_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ff48a3-a631-4752-9b4e-5b3b9bd799d1/51195563189.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/how_to_factory_reset_samsung_blu_ray_player.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/ielts_book_9_reading_test_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0fa112-5101-4ff6-97a7-f7f2cf2146ac/husqvarna_yth20k46_deck_belt_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13729c62-31e7-49b0-bd98-1c86125359bf/2011_chevy_traverse_lt_oil_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/visual_identity_design_template.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_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 5304 bytes
SHA-256: 8291a555b5d5b437661ed5e56ac22e213bb60ef0cdcc3c6ba814889fb0daf1b7
font_01_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 11984 bytes
SHA-256: 6d2e224c90ae6aae33ca1cf2a10027cb23945b90b9bc0d1022f4836910c76eb0

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