Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fb565090ac690d…

MALICIOUS

PDF

81.0 KB Created: 2021-02-23 03:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08372bb4c30068aaa56d28851815bcf0 SHA-1: 0a16f765ab2798a99b40d71c9d535ff75fb9f597 SHA-256: 86fb565090ac690d8819042fd2a63ed62eff97ac333e93b8423c2dabfb9c99a7
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'seumenha.ru' and numerous other embedded URLs suggests the document is designed to redirect users to potentially malicious websites. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext by indicating the document contains urgency or deadline language.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/strik?utm_term=how+to+put+pictures+on+apps+ios+14+shortcut
    • https://cdn.sqhk.co/sizafutito/gdhdjcI/citrus_tree_leaves_turning_yellow_and_falling_off.pdf
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fdb7e7a84478.pdf
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/razubude.pdf
    • http://hristogrigorov.com/dusedugid4pqcp.pdf
    • http://ejqy.com/24579780933le53y.pdf
    • http://soldatskaya6.ru/tabesuxuzelada9uubz.pdf
    • https://cdn.sqhk.co/sulugedako/iamjfid/dice_dreams_apk_mod.pdf
    • http://anbieterbewertung-autoscoutch.com/71291903715oy0wr.pdf
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/satiju-komezuzi-wifuwupadixikud.pdf
    • https://mofizuzu.weebly.com/uploads/1/3/4/3/134316779/2923181.pdf
    • https://cdn-cms.f-static.net/uploads/4415292/normal_600a6d8e644cc.pdf
    • https://cdn.sqhk.co/juvekuvop/3jl9gh4/ritowiwuxibisaxawa.pdf
    • https://cdn-cms.f-static.net/uploads/4467945/normal_600b770f325cf.pdf
    • http://jupapopikok.22web.org/the_husbands_secret_movie_2018.pdf
    • http://radanews.site/7233794792q7bdq.pdf
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/begusixiri_xinuvij_lapadeviw.pdf
    • https://cdn.sqhk.co/wufevinek/ijhfggp/cash_app_says_debit_card_not_supported.pdf
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/10edb7c3cf596dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000fe7c.bin
2c18a081f8ce923c145445ff81ab31716a909b4c3c07586a9438e0514774dbaa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 5180 bytes
font_01_sfnt_off0001102e.bin
01e8bd1d6ed45b576065771487e1bb372c2fb5221995d02616a9550fed39e6fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1102E 10716 bytes