Malicious PDF — malware analysis report

Static analysis result for SHA-256 760e26c90e29aa7e…

MALICIOUS

PDF

77.4 KB Created: 2021-02-27 23:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 28ddc828d249cf7615aeb89b94dae4b1 SHA-1: 750210fc6fa161b6524a413dd18325985c826783 SHA-256: 760e26c90e29aa7ef97363f22a585ecb8706426af43506fa9cdbf7558f724260
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, indicative of a link farm or phishing attempt. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to potentially malicious or SEO-manipulated content, possibly as a phishing lure or to distribute further malware.

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 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.
  • 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://leonvi.ru/strik?utm_term=fl+studio+12+macbook+air PDF link annotation
    • http://usesoda.pro/brisbane_airport_train_timetablebiyla.pdfIn PDF document text
    • http://gooddevice-online.com/evangelio_de_tomas56n2n.pdfIn PDF document text
    • http://zedukibawubige.22web.org/mexovumazev.pdfIn PDF document text
    • http://xakuneferufilew.iblogger.org/29271623293.pdfIn PDF document text
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/63aea1811101c.pdfIn PDF document text
    • http://world-wild-shop.com/awei_y280_user_manual60jjp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buvekopap.epizy.com/32644665491.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/introduction_to_information_systems_for_health_information_technology_third_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/13949784885.pdfIn PDF document text
    • http://guxajez.rf.gd/report_fire_hydrant_leak_nyc.pdfIn PDF document text
    • http://gimobomir.epizy.com/learning_joined_up_writing_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/us_passport_renewal_form_from_canada.pdfIn PDF document text
    • http://ramexizopu.rf.gd/inspirational_quotes_thich_nhat_hanh.pdfIn PDF document text
    • http://gametusepezuka.rf.gd/zonevemaripumijarel.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/dell_e6410_keyboard_keys_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/90300089269.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/wegefaxesonavasuni.pdfIn PDF document text
    • http://wajifinome.epizy.com/battle_royale_computer_game_no.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/11913858475.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/relative_pronoun_exercise_for_class_4.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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 2856 bytes
SHA-256: ede077bcf9d936b2deabd1ca36e5cf164b77d75f1467ec74ab7a8d43bb048d6a
font_01_sfnt_off0000edb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 5428 bytes
SHA-256: 4bcfb88a4781f1f594bec254305e89ea3fd928bfa72e57a4e58e1394b470f5bb
font_02_sfnt_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 12672 bytes
SHA-256: 70840f2d6541dbaa52f7ecd5f8b5e6431cb3c3558dceeac6f29159e05e464d24

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