Malicious PDF — malware analysis report

Static analysis result for SHA-256 72255a86a8043706…

MALICIOUS

PDF

81.8 KB Created: 2021-01-30 19:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c251c3a143e8e8136c4bd05348d79170 SHA-1: ef265a3b7a5925997a2d489d65eb5d3d371de79b SHA-256: 72255a86a8043706f1181afaea70982e99eac95568936aa5251b5d82729a5ea1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The file is a PDF that contains a lure impersonating Facebook, directing users to a malicious URL. Heuristics indicate brand impersonation and credential phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to phish credentials or deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://leonvi.ru/123?utm_term=minty+pickaxe+codes+generator.
  • 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=minty+pickaxe+codes+generator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376362/normal_5fedd954ecbcc.pdfIn PDF document text
    • http://lasns.fun/20911252212xny5b.pdfIn PDF document text
    • http://medyahanem.com/oakes_respiratory_care_pocket_guide8k7mr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fd7ceff1b2af.pdfIn PDF document text
    • http://table-wait.com/28371101234lohka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5fd1080476825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5feb0a8ad17cc.pdfIn PDF document text
    • http://betflixguvenilirmi.com/tiwuvuselagegunihs532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womejus.rf.gd/94408848592.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/varesubigafe.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/bileturokogesigolakesugaz.pdfIn PDF document text
    • http://tudifilik.rf.gd/everything_is_awesome_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/akmu_dinosaur_piano_sheet.pdfIn PDF document text
    • http://japivolenalu.epizy.com/academic_formation_definition.pdfIn PDF document text
    • http://xuzinom.epizy.com/mepawuginudomopubev.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/50086057150.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/16178442061.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 5448 bytes
SHA-256: eb6570c43c4af527b0e2f91d04679b7da863660b506a215647fa397012b0ac9c
font_01_sfnt_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 11524 bytes
SHA-256: 3f80ea476b8a1edfaba6eada489c20538ccc61dea513e4c0ff9c22641d40da87
font_02_sfnt_off00012594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12594 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

Open this report in the interactive analyzer, or submit your own file for analysis.