Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe575bb8d577366…

MALICIOUS

PDF

76.3 KB Created: 2021-05-03 23:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c6423675ed0a47a73dbb6d8c8e2d759 SHA-1: 919cd4fe9a044a8f4c6d217f336d3cb5498206b3 SHA-256: dbe575bb8d577366bc1f8bf441722bb298f6707cc5764a83af13bc7c2494164f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which, 'https://botokaw.ru/strik?utm_term=que+es+una+ficha+hemerografica+y+ejemplo', is directly linked to the document's apparent purpose of directing users to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'hemerografica' information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=que+es+una+ficha+hemerografica+y+ejemplo
    • http://dommasters.site/find_utility_information_by_street_address38tca.pdf
    • http://naturwows.space/ncaa_women_s_basketball_schedule_todayf7x8d.pdf
    • http://rusakova.space/2218320199p34z4.pdf
    • https://cdn-cms.f-static.net/uploads/4415936/normal_602c2ec64307b.pdf
    • https://cdn-cms.f-static.net/uploads/4489609/normal_605acaadf0ba9.pdf
    • http://about-central.com/tivutidorufumefagahdwqt.pdf
    • http://findattime.com/34034353479ffvfw.pdf
    • http://lassituda.online/basic_english_conversation2nizk.pdf
    • http://hotita.space/94162764094fy8u9.pdf
    • https://nikibowo.weebly.com/uploads/1/3/4/3/134354591/rujipupe_vewodelosotora.pdf
    • https://cdn-cms.f-static.net/uploads/4393369/normal_6042e94bc84f3.pdf
    • https://cdn-cms.f-static.net/uploads/4462368/normal_60262160b1f28.pdf
    • https://zadujogor.weebly.com/uploads/1/3/1/4/131406982/06487688a52b061.pdf
    • http://micrometerdigital.xyz/suwaveletapiz2ez3w.pdf
    • http://abwaab.su/9363625242126ffx.pdf
    • http://detonic-italy.website/cable_size_for_motor_calculatorp5bog.pdf
    • http://fortuneo-enligne.com/best_workout_dvd_for_seniorsw91ad.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://govabegos.weebly.com/uploads/1/3/4/0/134018252/cbe755d4ead.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1ba6959a-499b-4761-85fe-610f72ebfa40/3225458784.pdf
    • https://uploads.strikinglycdn.com/files/83707424-eea0-47bb-b95a-ac8651281e59/algebra_1_practice_problems.pdf
    • https://uploads.strikinglycdn.com/files/1f47b7a9-3949-4938-afd6-6160aa753840/would_you_change_your_religious_beliefs_to_marry_the_person_you_love.pdf
    • https://uploads.strikinglycdn.com/files/0a220efd-f1dd-48b7-94b4-b8fd66078807/mavudukovelilapiboj.pdf
    • https://uploads.strikinglycdn.com/files/b133f493-660f-49d8-a499-886affd23e32/luxuxawopalejujotinokepem.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ef.bin
13cd367552b0e122aaf11f189e8e21baac5e75749d2c96df26bbfd4011b9c98e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 5668 bytes
font_01_sfnt_off0000fc1f.bin
09281dde7d583b62eb067e3b9f6b82c6d13601c2ef2c6a85803a83ec18bbfa1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1F 11760 bytes

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