Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a8fbd4a1c7ae53…

MALICIOUS

PDF

81.1 KB Created: 2021-04-02 07:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 04030e1d44f3aa85fb6ee0ae6a84af88 SHA-1: 5a76a39f58bec6c4f40b53f4d9f9f66092fe63d4 SHA-256: b6a8fbd4a1c7ae5322539d52f8761e8a903bcb2c000f46a3bd12836881f9c1ce
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'impossible quiz 1 answers 19' and embeds a URL pointing to a suspicious domain. ClamAV and ML classifiers strongly indicate maliciousness, likely for phishing or malware distribution. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

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://vilenefex.ru/wix?keyword=impossible+quiz+1+answers+19 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381978/normal_6000244c20f50.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/jOjigfR/ropixorilef.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/bgghdgo/pafivubobo.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/e9zjJhg/jotubivabuxokitosim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412158/normal_60071e96c7117.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5fe00ea06912f.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/7jdlBgd/best_turkish_ringtones_free_download.pdfIn PDF document text
    • http://particulieres-societegenerale.best/what_is_an_aa_discussion_meeting4dvvo.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/24610706377.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://degevojorak.myartsonline.com/ridetemudabevunobabox.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/19521600607.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/european_cpr_guidelines_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014ee609-58c5-4a2e-b3d7-7eea8d5f1a06/22998712780.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/bcbsil_boeing_forms.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/how_to_calibrate_a_whirlpool_accubake_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a1115d-fadd-4d94-b70a-a3b2829f9615/financial_statement_analysis_icai.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/mirutidigutezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5063b5e0-d373-4656-896c-555037929c7c/how_to_replace_vivofit_jr_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/christmas_gift_card_images.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_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 5520 bytes
SHA-256: f2993cc3ce37b79998035a1d37fab108dc00975887aa0945715ce43b5f66bf3a
font_01_sfnt_off00011035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 11512 bytes
SHA-256: 1d7e2ae64d178f0d081a5c198bd0827fc4f934370ce377faf40fe373d96d51a0

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