Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26c2fcfc5305da2…

MALICIOUS

PDF

75.2 KB Created: 2021-03-26 14:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ba2cbad46b7645c83b9abd03ba6e7670 SHA-1: 2bd44b6c0cf2c81ea018428b268228e21a69c173 SHA-256: b26c2fcfc5305da29efe5a54fcc832e14880d9c65b0b77d4990d09c8a14eb32f
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/123?utm_term=bsc+nursing+rajasthan+form+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448740/normal_60572028eca74.pdfIn PDF document text
    • http://goodsun.fun/21864092334itblh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_601621dc3fb64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470228/normal_603e2e73d53f2.pdfIn PDF document text
    • http://titoto.xyz/65720696068j5rxg.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/sujofevejopufotunek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekivis.rf.gd/filemaker_pro_16_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/6737876308.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/msbte_model_answer_paper_winter_2016.pdfIn PDF document text
    • http://vubedarav.epizy.com/how_long_should_u_rest_between_sets.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/rarutusanukomadefew.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/23894953914.pdfIn PDF document text
    • http://gudukiderunusu.myartsonline.com/math_grade_12.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/zufugu.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/wonudili.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/vufomibaxekejis.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/42379587547.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/49069412702.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_off0000e726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE726 5868 bytes
SHA-256: 1182c85627f28373efee21e4917a9ae738cb76157cdf78a1ba6dac721f83eb28
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 11048 bytes
SHA-256: 4f7b36a165f6aa7aed4cfa1a64ad197987e95a54b332a5bc5df1a3202a16db10