Malicious PDF — malware analysis report

Static analysis result for SHA-256 518c3d9f470300af…

MALICIOUS

PDF

74.3 KB Created: 2021-03-18 01:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca43b7bd08f679112fec6f7a52c5aa8 SHA-1: 2be714ea64ead72bc0041d9f225d4a2748790f2d SHA-256: 518c3d9f470300afdd1203c612483bc2218a78eb38f41ad643225b61c2871c73
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URI points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=holt+junior+high+calendar
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5fea1466db590.pdf
    • https://cdn.sqhk.co/juvosuneni/iePvgjv/xibaga.pdf
    • https://cdn.sqhk.co/bomemenun/sWhchim/vitamin_b12_benefits_for_hair.pdf
    • http://zabemaladameg.medianewsonline.com/integral_calculus_university_of_sydney.pdf
    • https://mafupalitofix.weebly.com/uploads/1/3/4/0/134042392/sokarebubilejipulexa.pdf
    • https://josilagowuf.weebly.com/uploads/1/3/4/0/134018629/1872429.pdf
    • https://cdn-cms.f-static.net/uploads/4482623/normal_601a394ac4085.pdf
    • https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/joferoma_pojat_xerujanufi.pdf
    • https://fuxexitir.weebly.com/uploads/1/3/4/0/134098624/9244766.pdf
    • https://cdn.sqhk.co/gusiloxi/El3jhgj/zerado.pdf
    • http://tegeboxurogon.iblogger.org/pafinerivalaranowamoxi.pdf
    • https://cdn-cms.f-static.net/uploads/4445337/normal_60319135181ba.pdf
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5fd6b1e1cf273.pdf
    • https://cdn.sqhk.co/taxeseta/ejee66G/warhammer_fantasy_age_of_sigmar_wiki.pdf
    • https://tipirigemiwar.weebly.com/uploads/1/3/4/0/134016889/lovalig_saxopakozutexux_xapojoli_liwelewalufe.pdf
    • http://bamirajewenexo.medianewsonline.com/74862494592.pdf
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/zemasab.pdf
    • https://cdn-cms.f-static.net/uploads/4459176/normal_6026265236b84.pdf
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/pufevu-xetojevub-kidoda-rudomejuvexute.pdf
    • https://fegejakir.weebly.com/uploads/1/3/5/2/135299458/1a61f6c01.pdf
    • https://cdn.sqhk.co/savaketiju/4k3TXtM/bloons_td_6_apk_no_mod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vopuxoke.epizy.com/chicago_manual_of_style_ibid_footnote.pdf
    • http://pejasevolebik.rf.gd/dinosaur_encyclopedia_download.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_off0000e3eb.bin
48204d23e0c0046863b741bbd628f2d6f6c07f485c7363c1be684bad7479d4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 5060 bytes
font_01_sfnt_off0000f51c.bin
49cc5e325dc70368c2fa8a2ecaf7fd665f12e8dbb06dd0853a08817b2ad7b49f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 11396 bytes

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