Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed5ac8ab1e6c289…

MALICIOUS

PDF

71.3 KB Created: 2020-12-21 18:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 677b8c5ee61a371ecac21d696f0e108d SHA-1: 710c8dafc7dee8624b764aad75615fe13a9807e4 SHA-256: bed5ac8ab1e6c289b7e5189b0f0e270f77fc418be8379ad5b59dd9fbabe1b7a3
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical ClamAV detection of 'Pdf.Phishing.Trojan'. An external URI pointing to 'https://trafffi.ru/123?utm_term=negative+binomial+regression+r' was extracted, indicating a likely phishing or malware distribution attempt. The PDF structure and embedded content suggest it's designed to exploit user trust to redirect them to this malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=negative+binomial+regression+r PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f89595449cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_5fa55ccd1b9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_5fb98b4b2435f.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://s3.amazonaws.com/mulerux/english_font_free_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/practice_sat_chemistry_subject_test_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/38668558496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105b6046-966a-479d-841e-0efce7ab8f47/lavomabetenezuwawiwekub.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53140085bf90c0e192ce8/t/5fc84dffd32d012678f5615e/1606962687476/stick_super_fight_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcebe634-0a23-4496-8d1e-0f9b601c4804/the_first_time_movie_download_fou_mo.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/texas_dmv_written_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfe07af-8886-4f64-9695-8e9c42ba2730/8313485892.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/nadofuvisudamevizenigiwud.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_off0000cb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7C 4964 bytes
SHA-256: 889383124897009d6eac42f9814279d55aec8bb951b17896b439cf07936af83d
font_01_sfnt_off0000dc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC44 11020 bytes
SHA-256: 7e3fcd44957f96055ad4b41ce18653deda4792b4015da9ac6db45065285725aa
font_02_sfnt_off000101eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.