Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61117ec3ddf3d77…

MALICIOUS

PDF

67.1 KB Created: 2020-11-22 14:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bfa1e9aee379e7ebb89dc47dd8847505 SHA-1: e81d70230caaf7021573dff87982bf7c98c891b5 SHA-256: f61117ec3ddf3d77736bb0cb8711e8ecefc887a355f6ed17c2b450c514491e01
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Hamilton county auditor', suggesting a lure related to official documentation or services.

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://traffnew.ru/123?utm_term=hmilton+county+auditor PDF link annotation
    • https://xemupawiked.weebly.com/uploads/1/3/4/3/134321325/1055685.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/977c2f1b-27f6-4270-8e49-42d5d71ffd71/vokabivedenirobogufakif.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/64054731355.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/chat_master_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9745601d-114f-40f2-9d5a-bde888cbc9fe/procesos_basicos_del_pensamiento_cla.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/vert_shock_free_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f7804e-abb6-446c-b4e9-1491694733a1/iago_jealousy_quotes_act_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/kali_linux_wifi_hack_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/fokena/buwof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebd18a3-72b4-4d00-ba80-d7b9fd7d8dea/medimecum_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2238a0b0-fa48-4d93-a0dc-f228dc8e5c2f/linumefunatenebatovi.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/dark_web_search_engine_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1244f8-897a-47f3-b84e-387d10df012a/patepelarab.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/store_manual_2020.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_off0000cd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5A 4968 bytes
SHA-256: 168d476a00c7b9eecf30d7b363f06bc0ad811c08b1f50a4b631c4d41246711c7
font_01_sfnt_off0000de2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2D 9976 bytes
SHA-256: 49388ba6c6dde73821a814db5e877f7d148b0db3a3c80100f3772f588b61ba90