Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecd1c1905764622…

MALICIOUS

PDF

65.9 KB Created: 2020-11-19 06:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7b5a2d6920d34a6f28a9d13e9d46f2e7 SHA-1: bcb42fca9e97206e99277db6e11f75350a89e95a SHA-256: 8ecd1c1905764622c2c0df24c2871de6631342adcbb3bf5dbe983b53f5c81a93
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses a social engineering lure, prompting the user to install a browser extension or update. This suggests an attempt to trick the user into executing malicious code, likely leading to further compromise. The embedded URL points to a suspicious domain, which is likely part of the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=kaito+shion+age PDF link annotation
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/jawemepuwiwifisuluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f963ccfe547d.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/sanasozijemajo_motafaxetufi_kewirivute_tolitaz.pdfIn PDF document text
    • https://vadulovoke.weebly.com/uploads/1/3/4/3/134338980/2355870.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/559f82d9-06a2-44f7-b09e-3dcf117082f3/naruto_impact_save_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bafe20e-6b5a-4642-a5db-bb4905cbe82b/ge_oven_326b1230p001_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/zuligajefifenenetimafiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ccabdc-4fd7-4b77-83d4-3376b72afb4e/31310727139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/869cab9a-a516-4dac-8156-18470a18bdb5/wisner_gun_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46cf5f11-ac6f-4003-826a-3bce1b6ab325/tipijekite.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_off0000c511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC511 4788 bytes
SHA-256: d64c43a4bea6a09afa31ccb5997681a0040884d08d54947ac6729c7d20d79aac
font_01_sfnt_off0000d565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD565 11536 bytes
SHA-256: e7a55887745ad0f675c92f5dfc217e81a41c23d0489269bc43f7f40c09c3e2e1

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