Malicious PDF — malware analysis report

Static analysis result for SHA-256 661432f5816420d3…

MALICIOUS

PDF

86.2 KB Created: 2020-11-24 15:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cd071db134f6830cfefdf38ee027459d SHA-1: 93004df6765007d678c816ea5169cd33d19fc27e SHA-256: 661432f5816420d35c74b9728a723d4f72a0dbb65264a58be1bad83b86e866e5
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 0.9997

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://trafffi.ru/123?utm_term=explorations+in+core+math+grade+6+answer+key+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5f9056d5ddc9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f876cbe18302.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/451b71c9-63de-429d-8d7c-e8b784c7b041/zuxubexamonovedub.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/71283180811.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/dokumaxogutevaxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d163684-8fc6-4822-a88d-4ba5f6e9b583/sizalibejuxasiwuteg.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/qasida_burda_sharif_in_written_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/belavibikunosamubufa.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/muslim_baby_name_with_bangla_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/lejolejudaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/algebra_and_trigonometry_sullivan_10th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/tulika_bengali_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/43142487557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3dc93f9-5273-40ca-a515-6803fbebcd57/kukofobiraxokevexe.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/28215936066.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012ef5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12EF5 18380 bytes
SHA-256: 17a3edc48e8359ec9575c6729b584bf8078435ade6a4db1c1fd3c2afefdbb28a
font_00_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 6008 bytes
SHA-256: f734d5dce5ad317b9409b3511a4637981cd6e197d0d17b1fa7e84812f1053903
font_01_sfnt_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 11248 bytes
SHA-256: fee4ea1449018780830311c8712a4c162c238e9260ffc88167908fa5f6d85c24