Malicious PDF — malware analysis report

Static analysis result for SHA-256 5017f7df4d7aacd4…

MALICIOUS

PDF

138.9 KB Created: 2021-03-16 02:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 022492baeebb86230f94cf6dbca04035 SHA-1: 0fecedbdc84a7982613bfaa36c18f3f5a4112980 SHA-256: 5017f7df4d7aacd4454e04c220f313b49100023c50cfb99588a6e47d80f80a39
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', directing to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs suggest the document's purpose is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://botokaw.ru/wix?keyword=manhattan+comprehensive+night+and+day+high+school+ceeb+code PDF link annotation
    • https://nobexuliga.weebly.com/uploads/1/3/1/4/131405940/wifimewubi.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/muvofuziket.pdfIn PDF document text
    • https://nixitemolepof.weebly.com/uploads/1/3/4/8/134870129/7649986.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/sacroiliac_joint_dysfunction.pdfIn PDF document text
    • https://gaturipagi.weebly.com/uploads/1/3/0/7/130739573/tesokoxetitima.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/68637243208.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/liftmaster_8355_vs_8365.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/vosunupidutogowubamikejo.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/66249326995.pdfIn PDF document text
    • https://fisusaweku.weebly.com/uploads/1/3/1/8/131857315/venid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/easy_voice_recorder_apk_android_2._3.pdfIn PDF document text
    • http://bizepusozuj.epizy.com/59786522477.pdfIn PDF document text
    • http://fositelorefux.epizy.com/bmw_m340i_m_performance_for_sale.pdfIn PDF document text
    • http://dutebowoxaj.rf.gd/tururoxefibodo.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/background_eraser_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/outer_wilds_wiki_guide.pdfIn PDF document text
    • http://fadifisevak.epizy.com/cluster_headache_guideline.pdfIn PDF document text
    • http://memaded.epizy.com/meeting_agenda_and_minutes_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/milugixanoganitatakosure.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/kinog.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/bogifasof.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/61923182130.pdfIn PDF document text
    • http://tagitefidunun.epizy.com/candy_crush_saga_apk_hack_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E266 5792 bytes
SHA-256: aa0cfb6770e5f9cd1e9b67e950e103148cbd5db6773db81cff49ad471dc9f392
font_01_sfnt_off0001f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F606 11532 bytes
SHA-256: adc2d6d849bac65f1c04f978db5a7d306294fbe998c2596e3f20756c7c072dfc

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