Malicious PDF — malware analysis report

Static analysis result for SHA-256 48733138ae36965b…

MALICIOUS

PDF

88.1 KB Created: 2021-04-17 19:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a66c27c62576735dc614b5e6204eec88 SHA-1: 7639f648cc3e3d41b77352817dc2ce6ef0ec2fea SHA-256: 48733138ae36965b1b438b5ff04fc2b907ae6a8f6cdb0ce535fc4c3a798b659f
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. It contains numerous external URIs, with a primary suspicious URL pointing to 'seumenha.ru'. The document body, though heavily obfuscated, contains references to 'Brian Tracy eat that frog video' and 'wkhtmltopdf', suggesting a lure to a phishing or scam website. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://seumenha.ru/strik?utm_term=brian+tracy+eat+that+frog+video PDF link annotation
    • http://1xbet-football.fun/2006_chevy_malibu_ss_horsepowerr8692.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/zurimawivoxafewuf.pdfIn PDF document text
    • https://wibawamo.weebly.com/uploads/1/3/1/3/131383294/negosolotakofuwexiro.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/nekevilegoderozuxgeypp.pdfIn PDF document text
    • http://weareanonymous.org/descargar_monkey_boxing_apk_uptodowne4m6w.pdfIn PDF document text
    • http://gk-kuban.ru/the_norton_shakespeare_3rd_edgf29i.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/nepibadaxojudar.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://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_613dac9f8b394e57857f2f2b2c11f261.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69534c9-4940-49c2-aa03-6e8cd0d93399/donetezoxiwiwizeluru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f110dd4d-0a50-43b3-b51a-ae5dbfd2eb09/76765766988.pdfIn PDF document text
    • http://fonunegemo.epizy.com/bird_box_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d37ad5a-7dee-41ce-b26f-c020604b6e0e/kuzilokudamaxoteludan.pdfIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_a05342f5417c4209b69563854b97c69a.pdf?index=trueIn PDF document text
    • http://maderenefozido.rf.gd/data_structures_and_algorithm_analysis_in_c_second_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da83b4f6-e057-4af7-8e9a-9dcd65a53ab4/does_it_matter_which_wire_goes_where_on_a_hot_water_heater_element.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ea2297-2a30-44b6-939a-572e7bc6d261/diy_wooden_coffee_table_legs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f924850f-8f68-4121-9432-93f2e11dc8e2/yoga_mudra_steps_and_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8597135-c5e2-4dd0-b383-a3554aea1a09/26453385273.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_cfbd9531e3ee4cd196f6f9b2a325f222.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_c01433531c604e6084d37da4a7f39e8f.pdf?index=trueIn PDF document text
    • http://mexowotevofo.rf.gd/99036618798.pdfIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_7d284b36fa224254af71029851fa1f96.pdf?index=trueIn PDF document text
    • http://tuloguzosafulur.epizy.com/scary_stories_to_tell_in_the_dark_alvin_schwartz_online_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E9 3016 bytes
SHA-256: a57176794fb7a013e93cca151452ceab3ae41f145674f294752e3d0a0dd59424
font_01_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 5072 bytes
SHA-256: ffacbaa53d199f2b3ffa226a31f5f023c08303ab5b5d58f4f1738a6e90a5f83c
font_02_sfnt_off00011ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE6 10912 bytes
SHA-256: 2d474e59dab4ff7a762e657857f2f5e19af7a63764433510b918f806b65db9cc
font_03_sfnt_off00014249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14249 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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