Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14cc558b4fdf8ee…

MALICIOUS

PDF

74.1 KB Created: 2020-12-15 23:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4070a42a20b0a6d9ad481b3ed77b2687 SHA-1: 19e52d761519685df33e697efb7fa86950c228bd SHA-256: d14cc558b4fdf8ee4228fdd959af4a9f03a75120440eb74981cec09153494a7f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a phishing domain, disguised as a game guide. The PDF structure also shows signs of manipulation, such as duplicate object bodies, which are common in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=monster+hunter+generations+ultimate+gear+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fc6f6938dfed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_5fb56e63756b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5fb46718816cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_5fa5fedc90f9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc57e62a8793968642735c9/t/5fced3731a78ee5f0154fb12/1607390069668/birthday_card_collection_box.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/american_funds_simple_ira_distribution_form.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/power_outage_report_dominion.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/wepugukakiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc21d63-c010-43ea-a13a-613d6c04dbf6/branchburg_central_middle_school_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/gurdurr_pokemon_conquest.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc585359698b02c7f3ffd29/t/5fd73b04d654060362e31bbf/1607940874338/nico_nico_app_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58e5aaf0-324a-4595-8ea9-7ec37a2bbda0/32942161302.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdfbe05895864d895368ae/t/5fd20350eeaf2774ac9277f5/1607598930477/99860580110.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_off0000d246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 4892 bytes
SHA-256: 2ec3b732967017967c66f18f04b63a78ce44e043ad11bad24704a3a2b5f724b4
font_01_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 5244 bytes
SHA-256: afff7d60b50b1a2b2f10bc3a5b5b13758293a388b6bcd9c6f0bb2be7bb0b5a73
font_02_sfnt_off0000f4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 11460 bytes
SHA-256: 9b4329df29aed4f8a145efc81a9cb046df5fa7f5ab187aa11a650c37c4a5469f

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