Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5ec044c8d4a012…

MALICIOUS

PDF

103.2 KB Created: 2021-03-28 20:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 67adc71d4f7026958374fa16bb7f6424 SHA-1: 23d081472cb0a040b93cabea8106c36c5c7fd61b SHA-256: eb5ec044c8d4a0125cb51c2ee440aeb1ac172bf09e04be7919b7b35adb234268
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely the primary lure. The document body, though heavily obfuscated, suggests a question intended to engage the user, aligning with social engineering tactics.

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://jottigo.ru/strik?utm_term=what+are+the+four+components+of+the+mental+status+assessment PDF link annotation
    • http://fortuneo.best/contabilidad_de_costos_juan_garcia_colin_ejercicios_resueltosn84ji.pdfIn PDF document text
    • http://physcoo.com/how_to_start_weight_lifting_for_beginnersqjnn0.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/he7hfhg/black_friday_hp_laptop_deals_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/tjhhhcc/download_zombie_gunship_revenant_ar.pdfIn PDF document text
    • http://stav-games.ru/tixasazixatato56u7u.pdfIn PDF document text
    • http://13millions-warzone.store/pimokid98cw6.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/Vhhhahb/emoji_puzzle_game_level_273.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/1ifPhbZ/paper._io_3d_levels.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/bhbnie2/pregnant_simulator_game_online.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/zeworibuzoza/fukabajipekepugozakopof.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/ladolevu.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/annual_franchise_tax_report_delaware_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/emotional_intelligence_test_goleman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5235c6-d099-4d39-891a-a021fed179c7/gusabofipiselelupuguge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373c74c5-0572-4930-b8cb-3f2be844e7a4/tazatotivo.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/outlook_signature_template_group_policy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981f01ab-3114-4266-bdc1-46720dc8a5b0/xilow.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_off00014a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A48 5100 bytes
SHA-256: 33234fa6ba2036d35fe0f108fee13378af0b967df077e23fd42920c4efe218b4
font_01_sfnt_off00015b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8A 11448 bytes
SHA-256: b92f498e954608fe825333f2e65dfe6039a8ec5590b47b947d468716a0de2966
font_02_sfnt_off00018142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18142 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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