Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5769c2355a16599…

MALICIOUS

PDF

77.8 KB Created: 2021-02-15 07:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c5a6c225ab10658a28c29bc051197dfe SHA-1: 2bcffce6f4ce820954ba7504f3cf6da5cf0cecac SHA-256: e5769c2355a16599f56b1acf8d3bbb107818b68837ded93b4cf296328f486370
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a giveaway lure, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious website.

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://maypoin.ru/wix?keyword=free+iphone+8+plus+giveaway+no+survey PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456996/normal_601cb5f01cb5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5fdd96d749e47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://betiravel.epizy.com/daxabivakud.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/guxodevotaxidojejupajora.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/bosasudenamepobasofasu.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/basic_c_programming_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/89077205313.pdfIn PDF document text
    • http://setebixasabevu.rf.gd/27150202750.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/65545732717.pdfIn PDF document text
    • http://luralopanatu.rf.gd/92550660448.pdfIn PDF document text
    • http://nanaxaj.rf.gd/mujinobimajasufimuso.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/subject_pronouns_worksheet_1.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_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 5484 bytes
SHA-256: 9da4bcb9bc5543d4740a0247320109b2eec4b34d450bd737e8a202b39de362ed
font_01_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 10704 bytes
SHA-256: b896e070579c0aa90991991cdf4cd2153a2f85675a22c64329da21589e7a725d

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