Malicious PDF — malware analysis report

Static analysis result for SHA-256 0840f0c4b0f0934b…

MALICIOUS

PDF

81.2 KB Created: 2021-04-02 14:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 02979fc1458895d8f07d1aa5c741d496 SHA-1: 295226999d1bd02cb8a553b1028948eaece3628d SHA-256: 0840f0c4b0f0934b530454591f3a139bf625168182fff139a112f546d2d390c9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were extracted, the presence of numerous external URLs, including one flagged as unknown reputation, points towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=bhagavad+gita+in+bengali+book+pdf PDF link annotation
    • http://ubsvp.com/ariesms_leveling_guidei6mnu.pdfIn PDF document text
    • http://forecast.bet/george_foreman_rotisserie_gr80_manuallr8sx.pdfIn PDF document text
    • http://helpcopyright-service.com/namejagibatimalafonp0uce.pdfIn PDF document text
    • http://stakingyfi.com/55539088553l8jqt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8458b573-1d6d-478c-912c-b10a972f31df.filesusr.com/ugd/150112_d5cc8d95f6d64858951cba13901c633d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajezife/54904375208.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/non_compete_agreement_in_florida_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/best_cheapest_android_tablet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/brazil_song_free_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/pradhan_mantri_awas_yojana_form_kaise_bhare.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/carl_jung_the_shadow.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/88926488303.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/zisogubedovikatavix.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/delixawofipumatod.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_502450690c0845c9bf2bea108adfbf85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/tamilrockers_telugu_movies_2016.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_90fa4061c96949f780f61f92da822b7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voropa/joint_security_area_movie_english_subtitles.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_c8dba0b2261d42b0b6b9134769c702db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/metallic_bonding_worksheet_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/cbec_full_form_in_ssc.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF21 5344 bytes
SHA-256: 2b49ee9031121a665ede69baa2e7f720bf0cedc9ee186b9192cccad7ebd2080f
font_01_sfnt_off0000f157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF157 7940 bytes
SHA-256: 9b6392baa2edb8e8a8b63a677f173a009d7172caccc5e3fb10ee1930f5338462
font_02_sfnt_off000109d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D0 12596 bytes
SHA-256: 3f971df3ec0525f87c376ad008432a26fd4382cb8d5e0af2a7b56d1ad132b181

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