Malicious PDF — malware analysis report

Static analysis result for SHA-256 9540104dbbd30834…

MALICIOUS

PDF

77.1 KB Created: 2021-03-22 21:16:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4e7ab54ca14d1172775cf0ef882817c SHA-1: ea285052e4bcff20847e54825336f78793e9cefa SHA-256: 9540104dbbd30834165ec12ab897550448f47a9f8f331f4489cd6ca912c4f3c7
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://resalured.ru/strik?utm_term=which+broker+is+best+in+india', suggests a lure related to financial brokerage services. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=which+broker+is+best+in+india
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/juxomuwiwawoma.pdf
    • https://vobudogekatobef.weebly.com/uploads/1/3/0/8/130874620/2818007.pdf
    • https://rijixovo.weebly.com/uploads/1/3/5/3/135339233/5ef14e6adb3.pdf
    • http://sepibigejakina.22web.org/68458008397.pdf
    • http://zawirimo.22web.org/nuwodep.pdf
    • https://rokajovata.weebly.com/uploads/1/3/4/3/134376264/810688.pdf
    • http://fojibewuf.iblogger.org/13503963601.pdf
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/tunakijajizuz.pdf
    • http://xasanok.iblogger.org/libowisivogonurinep.pdf
    • https://visofebofoxofub.weebly.com/uploads/1/3/0/8/130814652/3712444.pdf
    • https://levibaxa.weebly.com/uploads/1/3/1/4/131408620/zevasofebejav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bovuzigaratufob.rf.gd/kadikemodiv.pdf
    • https://s3.amazonaws.com/lekizopiloref/xijiwumogipumasawufusevo.pdf
    • http://vumavoralamo.rf.gd/loxubitewibolitoruxa.pdf
    • http://luzasuzudi.rf.gd/all_in_one_er_apk_old_version.pdf
    • http://pufawalaxovosi.epizy.com/19752924336.pdf
    • http://sunuwib.epizy.com/balkansko_poluostrvo_jovan_cvijic.pdf
    • https://s3.amazonaws.com/jotizifime/34792836599.pdf
    • http://zinimivozu.rf.gd/xazodisixupefilixedelawub.pdf
    • https://s3.amazonaws.com/zalisujezajaje/doruzetuwek.pdf
    • http://lomemamimabow.rf.gd/32541899743.pdf
    • http://kebugitop.epizy.com/coliformes_termotolerantes_en_aguas_residuales.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_off0000eedc.bin
f0d80f11be1af34333faaceb2315815e9cbf83ac18b0e8d03d6799d1e88b2525		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 5212 bytes
font_01_sfnt_off0001009a.bin
b4af141d77ef10ba5856e5f97ca88701e35f23043347e9246e2e86e9db326cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1009A 11172 bytes

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