Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52aae4a80083975…

MALICIOUS

PDF

122.0 KB Created: 2021-03-22 08:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 640128cfaff8bc3b2e84b28f5b514507 SHA-1: a5f3375a3c2c179bbef30dda2720f40741827156 SHA-256: d52aae4a80083975c025774629fcbfda278c84c235bf72f3a2771deaf806b493
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document's primary function is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=why+is+tom+riddle+called+the+half+blood+prince
    • http://richmaya.site/topakusug65k1i.pdf
    • http://sizegoduxuxa.mygamesonline.org/91316725456.pdf
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/sojitusa-sijuda-fomebetatodafel-kunamofosatubiz.pdf
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/wesuririrowamatom.pdf
    • https://jojapunopumaj.weebly.com/uploads/1/3/1/4/131482926/sezogexaxigabekebega.pdf
    • http://vipmanmarket.space/table_of_contents_worksheets_for_1st_grade69yiq.pdf
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/japimixexosez.pdf
    • https://jagegoxutawek.weebly.com/uploads/1/3/4/7/134710672/zurafosogefi.pdf
    • http://gizigevom.mygamesonline.org/40377785932.pdf
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/ea8d929437ed639.pdf
    • https://mosuvixixe.weebly.com/uploads/1/3/0/9/130969854/6b0edd2af26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/485ad783-cc46-4d7e-9c4c-b3635a2992f3/73037193550.pdf
    • https://uploads.strikinglycdn.com/files/f46e667b-75ef-405f-a588-7056aab85340/85739619619.pdf
    • https://s3.amazonaws.com/pirosisob/periodic_table_worksheet_grade_10.pdf
    • https://uploads.strikinglycdn.com/files/b8c8b73c-42ee-4f38-9d90-5d0e29293e4e/8545396827.pdf
    • http://bibezakomi.myartsonline.com/69644653224.pdf
    • https://uploads.strikinglycdn.com/files/be0ef897-285a-46ea-8b8a-42566bc8fa79/54587515508.pdf
    • https://s3.amazonaws.com/tapexiw/real_estate_buyers_guide_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018518.bin
693931b7d8497ea2628a7533d5011680504e392a141ad61d7e4f91544a863191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18518 8072 bytes
font_01_sfnt_off00019f88.bin
92eeaf27326c13b25a91818cf39bbb77d74ff895395f4ce48e7696b8e5d24747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F88 5652 bytes
font_02_sfnt_off0001b2a4.bin
f9119681b23cf42604fcf18a19598b2740abdbfb8351be676736ad260a25cf6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2A4 12172 bytes

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