Malicious PDF — malware analysis report

Static analysis result for SHA-256 748a148811436edd…

MALICIOUS

PDF

71.5 KB Created: 2020-11-30 04:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d3fdc527c43dc60cd9be476ac7b76804 SHA-1: 5d5d74eab6c89f9f97faf54b3cdcf73283c48700 SHA-256: 748a148811436eddc7feff87bb3a6872d3911b28faea30a37862c2111a55f061
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with one specifically identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly benign PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=bodas+de+sangre+carlos+saura In PDF document text
    • https://ditikoxariwifip.weebly.com/uploads/1/3/4/6/134636805/4690485.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/kovolobox.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/nalifij/black_t-_shirt_mockup_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/how_to_calculate_capital_employed_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/91189297268.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/best_movies_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/spanish_alphabet.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/32788719.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/nasijemagilan.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/detovep.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/what_are_hit_dice_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/zebco_202_slingshot_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/uc_mini_mod_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/borrowing_subtraction_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/rofeguxi.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_off0000d6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D9 5156 bytes
SHA-256: c98ed21b3e6bf588817c3891a5f00f2192d0b90e9ed253d21bb6f9d69a7465e6
font_01_sfnt_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 11988 bytes
SHA-256: 3631e8e3f6d7dd15287232582f6b7948d73b1c529db20a3b6dc2cc656d914543

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