Malicious PDF — malware analysis report

Static analysis result for SHA-256 264226390edf755d…

MALICIOUS

PDF

68.7 KB Created: 2020-12-06 02:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a9d2caacac7b57dbacf83d767f808e41 SHA-1: 1dfb1cc3d23929f7bbca246dc63c34458c3ede61 SHA-256: 264226390edf755d4bda150521fb9eaa62ff176e60bd3be7abbf19540fd2b51a
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL, https://traffset.ru/123?utm_term=zen+archer+pathfinder, which is likely used to redirect the user to a malicious site. The document body text, though heavily obfuscated, suggests a lure related to 'Zen archer pathfinder'. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=zen+archer+pathfinder PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc66deb104edf1d77a71a57/t/5fc9cb549bc93d20d9af11c8/1607060309838/diranu.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/devil_room_items_isaac_rebirth.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/wuwokoseseripojigur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144361c8c7413143450ce/t/5fc4af232dd96f591881eccb/1606725412071/xawobusedudifo.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/57246211771.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/angelfire_bnsf_train_symbols.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/peludubiripupakafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19d9b34-bce4-4feb-b2d7-734e38da0250/67202054931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a256f110-67ec-4211-9189-c08fd0261687/mazda_6_wagon_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/fukushima_news_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c526dd-1653-45dc-80ff-6cc6037599fe/79901397631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188b1dbe-501d-4921-9d1b-f32cd704233f/lost_wax_method_of_casting_bronze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7accc19c-e648-411c-b54e-151f330305bb/xenovulukit.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_off0000cffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFE 4988 bytes
SHA-256: b263d3ea70e1d2d317c39040560123fd4db1666b3abb49d80e3fc30d03851062
font_01_sfnt_off0000e0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F6 11100 bytes
SHA-256: e75110f3d7193f00fcd069fc509f1379959c7771bc4f9e993d73c318532ebc84

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