Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20759744e207fdb…

MALICIOUS

PDF

76.5 KB Created: 2021-04-04 11:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97cb7b7ee6cd24bd908d80836eadc5e0 SHA-1: dd498600f4941b1b6fe2212bbe959d8077540e44 SHA-256: b20759744e207fdbf3c1b4bf118fec366e9248bc7ad619e8e827e9a2219b8129
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://dafemum.ru/123?utm_term=automator+for+mac+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421473/normal_5ff011db832ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5fe1fd9550e98.pdfIn PDF document text
    • https://cdn.sqhk.co/warugariluxe/Vjlidkg/teninivoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373779/normal_6000da172dd1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_60623597c11d0.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/cBggdTE/norse_gods_names_and_powers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489240/normal_6023c3c81716a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/31758621147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca077d7-fe8a-4982-9641-a8e06e649b60/kidde_how_to_remove_your_smoke_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c32dde-b62d-4c2e-a103-35f58394d589/78858505730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58372ff1-dd57-421a-8279-984f46f945ff/musepedixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3022b562-2d04-4ba3-93ed-842bb82371bb/commercial_electric_digital_multimeter_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644f6df9-436e-43ce-af47-c77123f06b9b/office_space_hypnosis_scene.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/nenubiwerozikomagujotiwew.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/android_studio_linux_minimum_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/30040789451.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/71358607942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/405bfabb-0db2-46b0-8b6f-cdfca3ade950/7911436619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039314f2-7847-4e99-9ec2-58a175b38821/how_to_greet_in_america.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/devexexere.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_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 4804 bytes
SHA-256: a7377354cfdda9f5d366a96ea2d46bffdba0a374b9d1d442875130b5165099e4
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 10848 bytes
SHA-256: 8f883b07b9f38424f3995d9666d95a517ddf96b92f3ed8501af895d6244e6125

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