Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9480eac2c2f0a8d…

MALICIOUS

PDF

74.3 KB Created: 2021-02-13 20:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2473dfab4aebf717adf716075fb013f0 SHA-1: 33bf5c84432a6d6474648240e8f9408b6e7e3221 SHA-256: a9480eac2c2f0a8d29e7cdf219772ee247d65ca720fe2eb35755a9b6a6d3c8ea
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational content, aligning with common phishing tactics.

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://leonvi.ru/123?utm_term=cell+structure+vocabulary+quizlet PDF link annotation
    • http://biomanua.website/35900249596kz7e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_6025fd2650e2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480743/normal_6020cd2a70f47.pdfIn PDF document text
    • https://zinenefubodejig.weebly.com/uploads/1/3/4/3/134338026/wisodenepuxafuk.pdfIn PDF document text
    • https://lemuvizavo.weebly.com/uploads/1/3/2/6/132682731/jifarazefiwevafoseg.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/552495.pdfIn PDF document text
    • http://haifaiv.ru/finding_area_of_odd_shapes_worksheetsubcr6.pdfIn PDF document text
    • http://good-production17.site/damages_season_1_episode_guidesfa7w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_600a91735f791.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nivobilov.epizy.com/website_templates_html5_simple.pdfIn PDF document text
    • http://kefixofelapadi.epizy.com/magovotegupuviwivatod.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/81371962158.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/13208988901.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/buffer_overflow_attack_tutorial.pdfIn PDF document text
    • http://xorosobodudirug.rf.gd/aquasoft_water_softener_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/tutuzenelojufexomak.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_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 5176 bytes
SHA-256: 2ee031c4bfdbf43752b65f87afdea83d889e5bc8e9862f37ebf339ef4dbd66bc
font_01_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 11080 bytes
SHA-256: 5b374ff49d5a78509a9df186cc8aa2a3942fe2c0c91caa125502ba4d96045c0f

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