Malicious PDF — malware analysis report

Static analysis result for SHA-256 71147a50f1c0a286…

MALICIOUS

PDF

79.2 KB Created: 2021-02-24 16:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bef5589145824ff4c5114a71c3894860 SHA-1: f94a0b7eec1849137aaca81ce674c447ca47a261 SHA-256: 71147a50f1c0a2864d5bfa24e149b3d756129f13186535fb1fbf4d8fab7a0aca
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI that redirects to a malicious domain, likely to deliver a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a search result for a repair manual, suggesting a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=briggs+and+stratton+vanguard+repair+manual PDF link annotation
    • http://toppiksnack.xyz/92627481407ma06g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484103/normal_5fe765e589455.pdfIn PDF document text
    • http://denaguful.iblogger.org/business_analysis_test_questions_and_answers.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/2003_infiniti_g35_automatic_transmission_fluid_capacity.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/kugupekuvajibidedis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_60252eac36395.pdfIn PDF document text
    • https://keboxineb.weebly.com/uploads/1/3/0/9/130969034/rogogilujoviwon_ponuwokemawed_vekap.pdfIn PDF document text
    • http://naturka.space/tazofefusagotol4jtd.pdfIn PDF document text
    • https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/4722499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_60057b71748ff.pdfIn PDF document text
    • http://mgacessoria.online/first_aid_kit_band_illnessb7a2m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fd06e85de109.pdfIn PDF document text
    • http://shoplus.info/introduccion_a_la_administracion_estg3l88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/python_twisted_documentation.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/73674566007.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/how_long_to_fall_in_deeply_sleep_at_night.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/puzezusow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 5272 bytes
SHA-256: 3c5d6e2124f4c984a82d5ac2c31b8b644cedaab280cac35b7650b1a3a9feab90
font_01_sfnt_off0000fd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD40 10444 bytes
SHA-256: 75d9b8418743ca1793b0be834cb8729237cfeb4a027028433a0a8b28857c0c20
font_02_sfnt_off00012112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12112 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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