Malicious PDF — malware analysis report

Static analysis result for SHA-256 6410ba0f87a41083…

MALICIOUS

PDF

78.0 KB Created: 2021-01-15 06:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a9aec4802960eb4a1b431e70c54149a6 SHA-1: 221b1d85d755c8a8cca04badb201236225e7571c SHA-256: 6410ba0f87a4108365db068b6fea67cf862635744cabc117022006682903b09d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to leverage web content for malicious purposes, potentially involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?utm_term=chunkzz+malayalam+movie PDF link annotation
    • https://bekusidazeri.weebly.com/uploads/1/3/4/8/134859547/247847.pdfIn PDF document text
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/bekojuravemusef.pdfIn PDF document text
    • https://site-1177739.mozfiles.com/files/1177739/71519868682.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/jrYoyie/98360999885.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/3129980.pdfIn PDF document text
    • https://zeziruxowajud.weebly.com/uploads/1/3/4/6/134698921/jedimogovix_vuligujetoj_fesote.pdfIn PDF document text
    • https://site-1172874.mozfiles.com/files/1172874/jidusabewoz.pdfIn PDF document text
    • https://site-1172039.mozfiles.com/files/1172039/box_office_class_of_83.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/chcbiaN/mewoninusobebulolelu.pdfIn PDF document text
    • https://site-1173349.mozfiles.com/files/1173349/dixurodejabipavuviv.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fezenur/ninewusut.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/aukey_dual_dash_cam_review_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/2007_toyota_yaris_repair_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/bovikamus.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/39271032087.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/breakup_mashup_song.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/92155034694.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000e3bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE3BD 6748 bytes
SHA-256: ad8bea1c450513ba9252c625497ad491994455b3577adc3958f877397eefd247
font_00_sfnt_off0000d376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD376 4832 bytes
SHA-256: cef47c0b4d105fdb6394a974aee64e243362cddb6558f3b415f2eb32bc4b7e52
font_02_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 2024 bytes
SHA-256: a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554
font_03_sfnt_off0001047f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047F 11092 bytes
SHA-256: 42072454d1c50cbb22174fdc6a3b93bdeec27f1de5918a814eb13d94ad46e9f5

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