Malicious PDF — malware analysis report

Static analysis result for SHA-256 250173c8fdf58941…

MALICIOUS

PDF

69.4 KB Created: 2020-12-17 21:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e112fb9b53493866a010fab47178eb86 SHA-1: 9f025a4b6d286a37304950fb58ec468522d67b92 SHA-256: 250173c8fdf5894126750c80a1f28bdbcbd3e82bbc368c2f29a64db921773799
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=how+to+calculate+point+estimate+in+r'. This, combined with a high-severity heuristic for a payment redirection lure, strongly suggests a phishing attempt. The ML classifier also flagged the PDF as malicious with a high score. No scripts were extracted, but the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://gettraff.ru/123?utm_term=how+to+calculate+point+estimate+in+r In 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://uploads.strikinglycdn.com/files/67c70002-2a5a-4fd5-aac1-817186ddcc37/carnival_cruise_ship_dry_dock_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/36690068152.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/88679225335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ac6a20-3b1e-4bb2-b0bc-78d75f260ab5/consecutive_exterior_angles_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32fe508-4c6c-460d-834a-7581eacad8fa/41611963457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208c0f29-0f31-4d1f-9496-10f881c0a9be/what_is_dissolved_oxygen_in_blood.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/mixezi.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/35362368443.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/93392860112.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1129368612547ed5f20ea/t/5fc356af2dd96f5918589e7b/1606637233793/vocab_level_d_unit_12_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09953649-baa1-4afb-849b-c70b24ce20e0/raising_your_spirited_child.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/bushnell_backtrack_gps_360053.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_off0000c5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C0 5012 bytes
SHA-256: 4298a93be6a9599fc9ea3df2af7ce489d49ed005260d55fdca8f21b125480ea4
font_01_sfnt_off0000d6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B4 10584 bytes
SHA-256: 2aa41a641f2f327cad696cd4b65c61b7f86e21470853151e7d5c109d877a7da1
font_02_sfnt_off0000fab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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