Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c487a73f02599c3…

MALICIOUS

PDF

70.8 KB Created: 2021-02-12 13:38:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2f8c2107e1f62b77ca4169c76500b165 SHA-1: db472d3cbe2efb90d4c180a4d764f251f01eee17 SHA-256: 8c487a73f02599c3df465e370ace235b7fc7611e00354794028ecc8ae51dfaf5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, particularly the one pointing to 'jacksth.ru', suggests it is part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further malicious content.

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://jacksth.ru/wix?keyword=broke+millennial+takes+on+investing+pdf+download PDF link annotation
    • https://cdn.sqhk.co/sepetuvab/mjaLjhH/fusifituzam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374198/normal_5ffbedbe3f947.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/icgeiho/wobifawebojerefev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_5fdcf827ad4a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_601928f3a1880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_5ff0624a382d7.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/ie1cuie/47156418940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_5fda4f596bb72.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/UOidHpg/undead_defense_tycoon_script.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/jiiiiib/carnival_games_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/iglicIX/dingo_pictures_tv_tropes.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/ifjfTGr/ice_rage_apk_mod_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_602612f018fe0.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/jcgfIic/kaiser_flu_shot_schedule_2020_california.pdfIn PDF document text
    • http://tofuvuniz.iblogger.org/flight_instructor_lesson_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/jh4lhfh/ledijolafigabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477369/normal_5fc94cf7eb428.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesokijodaroxo.epizy.com/material_certificate_of_compliance_template.pdfIn PDF document text
    • http://desazibali.epizy.com/acacia_auriculiformis_seed_pods.pdfIn PDF document text
    • http://zegisaxan.rf.gd/datalumonexageke.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_off0000d7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BF 5628 bytes
SHA-256: d49fb457e4b08f524161140a58543b1a6755b0f94187bf6bc0855e80972c0adb
font_01_sfnt_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 10184 bytes
SHA-256: c83b752fd4758562c78feb20f0a50cfa75b0015b314b8056c81f0e646b913890

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