Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f359c29bdbef8c8…

MALICIOUS

PDF

76.0 KB Created: 2021-04-05 11:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f30112c0250ae5369c4a29d6cb6fb049 SHA-1: ec0e68ebdadbe3ce7ca1f9d0ded712c7aaafe668 SHA-256: 8f359c29bdbef8c8c2e280666b66c530510fe4ba1210a82d09e737d1d90b9d65
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The document contains an embedded URL that directs users to a physics worksheet, likely a lure to encourage clicks. No scripts were extracted, but the presence of embedded URLs and the nature of the detection suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=physics+scalar+and+vector+quantities+worksheet
    • http://ses-sanobrabotka.ru/business_communication_chapter_16_quizlet499xw.pdf
    • https://cdn-cms.f-static.net/uploads/4475219/normal_606a5ede6571e.pdf
    • http://zanedasimitavo.22web.org/votixebiwusitililomuta.pdf
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/e371d72a75b14.pdf
    • http://wisitens.online/black_and_decker_20v_cordless_trimmer_run_timeznlta.pdf
    • http://getallcreditscores.info/snake_eggs_in_a_dreamdmze2.pdf
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fe8bdc2cdd03.pdf
    • http://paxazesak.iblogger.org/blender_2._8_manual_download.pdf
    • http://lojasamericanasbr.com/5844922249xujfq.pdf
    • https://koxawobe.weebly.com/uploads/1/3/4/5/134528326/gexiviwuzugu.pdf
    • https://static.s123-cdn-static.com/uploads/4410222/normal_5ff3ea416ce30.pdf
    • http://jobudafeva.22web.org/39764885783.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sedoguzod.rf.gd/camscanner_para_pc.pdf
    • http://pisironebininuw.rf.gd/brigandine_ps1_android.pdf
    • http://moraruvotu.epizy.com/vernier_caliper_experiment_procedure.pdf
    • https://dce09894-55e7-49e1-9c43-b94069c58f23.filesusr.com/ugd/11ae40_5ace9c5af0b2450fad35cea677321a0f.pdf?index=true
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_5dd5cdc2ed684af98bf796e488f23322.pdf?index=true
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_6becc0d434d64cc1ad3fc1765fe3db0d.pdf?index=true
    • http://mowesedapi.epizy.com/all_tamil_comedy_video_free.pdf
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_e380c141405f4f02a0b199bcac26541d.pdf?index=true
    • http://rozipiliwune.epizy.com/chute_de_tension_electrique.pdf
    • http://pakafadudu.epizy.com/breadman_manual_tr555lc.pdf
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_baaabee7ffd44e429b9415ebe7c22ef7.pdf?index=true
    • http://godutiliwaganos.rf.gd/barbie_doll_game_karo.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_off0000e702.bin
6577d07bc2615919290052e30c8f82967ad6e91239826fafae58411c26f7f83a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 5472 bytes
font_01_sfnt_off0000f9b0.bin
e1fff27b9de20e3309f57b11fb4291516b68fca2cbd6b9ddd85c682c24ce8fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 12684 bytes

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