Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d9cdee03896285…

MALICIOUS

PDF

68.8 KB Created: 2021-04-02 21:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 583a423962ef98062482c9ec804606df SHA-1: 082cf8d95dce9d676c04ebd08ebd1ca2c09abe5f SHA-256: 29d9cdee03896285ba4f62004054f03b779946e8a49b2c193876f088ec4bf95a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, with several pointing to disposable domains or potentially malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through a link farm. The document body appears to be malformed or obfuscated, providing no clear user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/123?utm_term=globo+reporter+horario+globo+news PDF link annotation
    • http://euroshopme.site/how_to_charge_stanley_fatmax_lightj0h4u.pdfIn PDF document text
    • http://ygrash.website/what_was_the_radical_reconstruction_plan_of_18675d6u6.pdfIn PDF document text
    • http://laludinemolat.sportsontheweb.net/95201925016.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/14759486995.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/farm_tools_and_implements.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/becc0ba9-7047-42fc-91b9-0350a3400260/essential_elements_ukulele_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df997bc-2804-4f51-90eb-3e0117d932f2/895890450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98e0fc4-2c8a-45f0-98d8-2bf1263bc01f/operating_instructions_for_bissell_proheat_2x.pdfIn PDF document text
    • https://b42dfab6-8227-42c4-8fe5-fc04d9433513.filesusr.com/ugd/a9a8df_27d249a181754ca6bac8360aa7eb6d60.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_15ca598769684501a825ade2e18cf672.pdf?index=trueIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/how_to_determine_level_of_proficiency_in_a_language.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/partners_balance_sheet_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6420876-9283-46b1-b452-35a88a73cdc0/33766431998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28ecf99-22b9-4cf1-a8bf-3369ae3a447d/interrogative_pronouns_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/channa_mereya_punjabi_movie_full.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/craftbukkit_1._12._2_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/jusoginugeforotopuga.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/ashoka_movie_all_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/baby_white_tiger_stuffed_animal.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/algebra_1_graphing_linear_equations_worksheet_answers.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/6th_grade_adding_fractions_worksheet.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_off0000cf13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF13 5344 bytes
SHA-256: 28ba490f7fd5f9639aa38f1c13dbbc543942199723778d627bf44428270c4aad
font_01_sfnt_off0000e148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 11452 bytes
SHA-256: f6afb2e4c9a734f01f8b8f702bb11408ae813945a3994df37394bdbbbfadf917