Malicious PDF — malware analysis report

Static analysis result for SHA-256 421a60c53316e0d7…

MALICIOUS

PDF

78.6 KB Created: 2021-03-25 07:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37ee022a1c4b66591dc19c33e3872c4a SHA-1: 510b48e3bff5c20cd1864552254b3a2d41874743 SHA-256: 421a60c53316e0d718804f2c39671eecbe62e1854eb3ccdddef09043e75288b4
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URLs suggests the document is designed to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/wix?keyword=oliver+ames+track+and+field+results
    • https://cdn.sqhk.co/felolavap/jbCyhgL/64694276614.pdf
    • http://wegoluxetas.scienceontheweb.net/aeolian_processes_and_landforms.pdf
    • http://subonus.ru/jewedalemojozelijherv4.pdf
    • http://chisto-chisto52.ru/simple_present_tense_basic_exercisesrluch.pdf
    • http://forsage.pw/star_trek_discovery_season_4_air_datemml6x.pdf
    • http://esagafow.fun/mojivajatojunuxisa8plkd.pdf
    • https://cdn.sqhk.co/kufejeni/jijJYha/lopaxumuw.pdf
    • http://ourfanz.com/call_of_duty_ww2_android_games_downloadcmgdn.pdf
    • http://vazawujuzu.sportsontheweb.net/55973187530.pdf
    • http://mevukavotidu.getenjoyment.net/82502778946.pdf
    • https://jinafoxibufesow.weebly.com/uploads/1/3/5/2/135293268/fomiru.pdf
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/270901.pdf
    • https://cdn.sqhk.co/fovuxugo/VUPkea1/fotur.pdf
    • http://suwetobolubujub.getenjoyment.net/hybrid_cascaded_multilevel_converter.pdf
    • https://duxegebipuvakij.weebly.com/uploads/1/3/4/0/134095857/5577749.pdf
    • http://bepifukikuku.mygamesonline.org/vadetavonino.pdf
    • https://rusolozotiwar.weebly.com/uploads/1/3/5/9/135992237/nudibowiwosu.pdf
    • http://nesobaka9.xyz/fadadotikujozokuw5lus1.pdf
    • http://1eyvgo.xyz/xujesididutazuxupozagrxjqv.pdf
    • http://gomijexa.mywebcommunity.org/pejavinilenotelugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bogalibamadom.myartsonline.com/42473420886.pdf
    • http://tevaluzax.atwebpages.com/arduino_uno_45_projects_for_beginners_and_experts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64a.bin
c9406abc01c6f1129049f815e3919e0afdfdb31c1891e6d0c68bc70dd6b08244
pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 5092 bytes
font_01_sfnt_off0000f789.bin
020be850bbe7ed9bef0a549aaef3652f63c1db8c9163d1f8ce62afe8eb37202f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 10964 bytes
font_02_sfnt_off00011ce9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE9 4324 bytes