Malicious PDF — malware analysis report

Static analysis result for SHA-256 330708317a02b27c…

MALICIOUS

PDF

76.2 KB Created: 2021-03-08 10:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d74470ee2b10cfffcb5b22177a6aa1df SHA-1: 4bfa7e465182da0a6e083c7edf7df931283cc95b SHA-256: 330708317a02b27cf56867afa413976bd0076ca8f131370ed30f117589429dc6
126 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified as a phishing/trojan by ClamAV. The PDF's content, though heavily obfuscated, suggests a lure related to 'Le marxisme pour les nuls pdf'. The presence of multiple external links on disposable hosting further supports a malicious intent, likely to redirect users to a compromised site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://xezojetit.ru/award?keyword=le+marxisme+pour+les+nuls+pdf PDF link annotation
    • http://sewukagazub.mypressonline.com/8167727857.pdfIn PDF document text
    • https://kusonanozeko.weebly.com/uploads/1/3/0/7/130775507/fusebope-jadafif.pdfIn PDF document text
    • http://motorutovibipe.sportsontheweb.net/aws_braindumps.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/crown_xls_2000_price.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/tDwL3jd/sweet_escapes_design_a_bakery_with_puzzle_games.pdfIn PDF document text
    • https://cdn.sqhk.co/lazodadevab/Ehgrif5/64610216100.pdfIn PDF document text
    • https://saboruxeketeg.weebly.com/uploads/1/3/4/8/134850947/f6a545aff26.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/3896559.pdfIn PDF document text
    • https://wemawamirake.weebly.com/uploads/1/3/5/9/135959397/vutokisunefuritobe.pdfIn PDF document text
    • https://xujarilo.weebly.com/uploads/1/3/4/6/134693127/pemutanaxolaviloz.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/3ff30bd3-921d-4f33-a913-2dd886bd0542/91321364276.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/74893357671.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/86361289106.pdfIn PDF document text
    • http://divonuniset.epizy.com/what_is_the_definition_of_a_frequency_table.pdfIn PDF document text
    • http://xuxivobanirug.epizy.com/is_there_a_season_3_altered_carbon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bcb3cd9-a3fc-491f-ae22-5cf17ab42006/16304808121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4682e137-a843-42ac-b6de-3c27d469e99a/graco_nautilus_3-in-1_car_seat_crotch_strap_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45c8636-2c5f-4cdd-b2d5-fc32e7e28f1b/kisaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cbfbbd2-83ec-4da5-8413-0f5f2e6e2b74/authors_purpose_definition_synonyms.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_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 5196 bytes
SHA-256: 598a65db2b332c86e53e74d985feddc1a09eddd6849fcc5bcdf467976aaed414
font_01_sfnt_off0000fc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC35 12168 bytes
SHA-256: b36257ba7cceab0f099adc64224db0b3688086dc45acfdf57fe79a3073f15264

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