Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3c200a180da732…

MALICIOUS

PDF

77.9 KB Created: 2021-03-15 13:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d25144a564032d24f43230d62bd4964f SHA-1: 9a3467e2fb2121f946a6635291d8148d3fdb0c70 SHA-256: be3c200a180da73221bff4f3160b7ea7a9524e6ddaa79d4d3a39062a6924708f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'golowaki.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format and the nature of the heuristic firings suggest it may contain embedded JavaScript or exploit code to redirect the user to the malicious URL.

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://golowaki.ru/award?keyword=acids+and+bases+mcqs+pdf
    • https://cdn-cms.f-static.net/uploads/4388060/normal_6026dbb418e66.pdf
    • https://cdn-cms.f-static.net/uploads/4382638/normal_601548436dc2b.pdf
    • https://cdn-cms.f-static.net/uploads/4464330/normal_5fd61ca5a3662.pdf
    • https://cdn-cms.f-static.net/uploads/4388614/normal_6015ae7416d67.pdf
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fd7664e54126.pdf
    • http://comp-arenda.site/imagine_ukulele_fingerpickingxfdrk.pdf
    • http://hookup154.site/epic_games_free_games_2020_septemberfvnqc.pdf
    • https://cdn-cms.f-static.net/uploads/4443341/normal_6041c209e47a9.pdf
    • http://copyrightsupporthelpcenter.com/keban89moe.pdf
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5fd86169114b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://poruzimikipazan.epizy.com/wumujezivokerulimejezada.pdf
    • https://s3.amazonaws.com/kegubinefuda/22620223630.pdf
    • https://s3.amazonaws.com/desekusoxi/melodyne_4_assistant_manual.pdf
    • https://s3.amazonaws.com/dakebesuvum/81889738924.pdf
    • https://s3.amazonaws.com/zafijukopa/eviction_letter_template_free.pdf
    • http://tirinito.epizy.com/exponent_worksheets_5th_grade.pdf
    • https://s3.amazonaws.com/daniwodug/fulexosawuruk.pdf
    • http://jamipuvulegaze.epizy.com/20393647061.pdf
    • https://s3.amazonaws.com/gagagakigibapo/pugaponoxam.pdf
    • https://s3.amazonaws.com/povelenavuviw/les_mis_25th_anniversary_ending.pdf
    • https://s3.amazonaws.com/xukirizugukugi/48445088207.pdf
    • http://konevimojo.epizy.com/himmelblau_balance_de_materia_y_energia.pdf
    • http://zitupelu.epizy.com/punjab_law_officers_engagement_act_2017.pdf
    • https://s3.amazonaws.com/bomupi/69_camaro_service_manual.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_off0000f543.bin
1e911e1df1ae18c1e78e2d9ae037f1fe77e2bb5547158114fc1a873c45cba351
pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 5428 bytes
font_01_sfnt_off000107a7.bin
d0e551c0eb380546832c9e4586ab8af86d5a9de37a453394eb27903979988d4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 10152 bytes