Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b5b98e01b9d10e…

MALICIOUS

PDF

78.6 KB Created: 2021-03-08 06:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 473980aaf2ef1a1e4f9cd229512ddc2f SHA-1: b5078b8f8572d8dacdf8c958ad98b381b3fa8efb SHA-256: 10b5b98e01b9d10edd83464bc7ea390e12a629b74c6ff55fdfef38fd5b8c85d0
104 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 and a visual download button suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format and embedded URLs are commonly used to deliver malicious content, potentially via JavaScript exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=thinkertoys+michael+michalko+pdf+download
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/sukenamemoxeke.pdf
    • https://cdn-cms.f-static.net/uploads/4383128/normal_603a875d5b09a.pdf
    • https://cdn-cms.f-static.net/uploads/4384839/normal_601df7ededac3.pdf
    • http://saduzemed.mypressonline.com/1727563031.pdf
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/33476c8c.pdf
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/7706183.pdf
    • http://sabovibin.medianewsonline.com/digital_design_and_computer_architecture_solutions.pdf
    • https://julixejim.weebly.com/uploads/1/3/5/3/135393951/ledegeg-sojojota.pdf
    • https://cdn-cms.f-static.net/uploads/4456116/normal_603a8b596158a.pdf
    • http://jekefidaz.mygamesonline.org/weniwirosites.pdf
    • https://static.s123-cdn-static.com/uploads/4411219/normal_5ff6589c2a7f8.pdf
    • https://cdn-cms.f-static.net/uploads/4447098/normal_603ca9aee5499.pdf
    • http://xenotobewaf.22web.org/tds_tcs_tax_challan_form_280.pdf
    • http://derilezin.sportsontheweb.net/computer_hardware_components.pdf
    • https://valuluxunu.weebly.com/uploads/1/3/2/7/132710491/94d9f7.pdf
    • http://levotavo.scienceontheweb.net/samsung_ah59_remote_reset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://leruvuk.epizy.com/allworx_phone_9212_manual.pdf
    • http://faleferesevo.onlinewebshop.net/80148497985.pdf
    • http://pidodexogejax.myartsonline.com/futudokorufe.pdf
    • http://xemigososefof.atwebpages.com/connect_acurite_to_sensor.pdf
    • http://waxetip.rf.gd/apache_fileutils_jar.pdf
    • http://subepofusetafop.epizy.com/v_for_vendetta_graphic_novel_citation.pdf
    • http://vumamuv.myartsonline.com/37378544105.pdf
    • http://wumekupewug.rf.gd/anti_malware_free_for_windows_10.pdf
    • http://lenuduxefo.epizy.com/how_to_use_a_bosch_washing_machine.pdf
    • http://detuzojezil.rf.gd/orbit_sprinkler_timer_manual_4_station.pdf
    • http://jijutapomu.rf.gd/fearless_friday_5a_football.pdf
    • http://zimopup.myartsonline.com/nuluforawujofar.pdf
    • http://jojugabijogi.rf.gd/spanish_words_that_start_with_k_and_their_meaning.pdf
    • http://godotarubaxo.rf.gd/detozipugakoj.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_off0000f668.bin
7af02d135838bccafb65c16d333a516c2a0764360a3f20351a13b89a4a806481		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 5600 bytes
font_01_sfnt_off00010961.bin
3310b210cc0d4a1a53a6b88c4be3b50b5807600a99afd74c6462ae279d24d82e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10961 10184 bytes

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