Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c4589457785fab…

MALICIOUS

PDF

70.5 KB Created: 2021-02-20 09:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 62576bc281ce849bb16b22de207167c0 SHA-1: fa17b78e4565ee005af8645c59fcda442ce81c17 SHA-256: a6c4589457785fabaf833ee756efbe497184c904bba06ec6744b493e0b72e7b7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or scam attempt. The document body, though heavily obfuscated, suggests a lure related to an 'Esky scanner manual'. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=esky+scanner+manual PDF link annotation
    • https://cdn.sqhk.co/gotakavapu/gElyijO/siwanaxa.pdfIn PDF document text
    • http://meetchambre.xyz/adecco_group_annual_report_2017l617j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5ff82f3e689e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5fe38a100430e.pdfIn PDF document text
    • http://phrensy.co/venawugemvfcsj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5fc747b0604a5.pdfIn PDF document text
    • https://cdn.sqhk.co/takakakod/ifajitN/schema_branchement_moteur_electrique_monophase_220v.pdfIn PDF document text
    • http://shop50off.info/libros_de_calabozos_y_dragoneslb6hg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fd0964e7c9f0.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/OidjjcU/vebasitiwawixiritet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajujiju/messenger_video_to_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/99268941228.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/jurorajatasurijasijid.pdfIn PDF document text
    • http://wimoduwogukuruk.rf.gd/altos_adventure_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/fofizapa.pdfIn PDF document text
    • http://zuwasezubolek.rf.gd/33821180181.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/15733180326.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_off0000d82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82C 5068 bytes
SHA-256: 48a824eec867bf66cd2b05aba4e07e1d4f217ce1bbb48dfcfc90ef84f817f015
font_01_sfnt_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 10572 bytes
SHA-256: 1288d689b564a686c2e283f9e66d42b2349548d04b42a2f607047c74f2b35e3b

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