Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d10f0b9fea28825…

MALICIOUS

PDF

62.7 KB Created: 2021-01-25 07:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6ecb04f2c00bf8674c6a161d6957645e SHA-1: 7d38c75bb95ab71bf726ee6a0ebcc37b2538e57f SHA-256: 2d10f0b9fea28825597142fff01616b6c351b69e48d9a7f35889c570ddc198d8
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one prominent URL pointing to 'maypoin.ru', suggesting a potential phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to distribute further malicious content.

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
  • 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://maypoin.ru/123?utm_term=a+town+uncovered+walkthrough PDF link annotation
    • https://zamamuxito.weebly.com/uploads/1/3/4/2/134234866/46714.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/2297339.pdfIn PDF document text
    • https://peturenu.weebly.com/uploads/1/3/4/4/134401199/mivogefeja.pdfIn PDF document text
    • https://wixolovab.weebly.com/uploads/1/3/0/7/130776385/1b842af12.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/hfphci3/machine_gun_kelly_dating_megan_fox.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/wojonoxunoxipuw.pdfIn PDF document text
    • https://putuxukive.weebly.com/uploads/1/3/1/3/131379249/3748371.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/ganubifirigevi/fibroscan_interpretation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/viwazi.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/accounting_number_format_excel_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/capitec_app_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/rudigozat.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/blackberry_z10_mobile_whatsapp.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_off0000b78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB78F 5228 bytes
SHA-256: 03e7528aa782b8b0af5fae738493cf2f3304b35788a16b4c1f3581a44e930716
font_01_sfnt_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 10760 bytes
SHA-256: b39090b04ecf3ce43d439ebace213017df95b8f63ff794abef9492ae7f326e3b

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