Malicious PDF — malware analysis report

Static analysis result for SHA-256 351d09abee97ccae…

MALICIOUS

PDF

73.3 KB Created: 2021-02-19 14:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0e2086cf3cb563f54405d5d517c1729c SHA-1: 01c978e616d00ddb767d5435ee4d6e66cae9884e SHA-256: 351d09abee97ccae530fb9cf04b6cee2f2cd1a1621172569db9476353710a212
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, indicating a link farm strategy for SEO manipulation. The primary purpose appears to be directing users to potentially malicious external sites, as evidenced by the numerous unknown reputation URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=which+configurations+violate+hund%2527s+rule PDF link annotation
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/memoroxefafu.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/1091564.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/cWLvih6/53586343175.pdfIn PDF document text
    • https://ludutaxe.weebly.com/uploads/1/3/0/8/130814402/774807.pdfIn PDF document text
    • https://modevibivuruwix.weebly.com/uploads/1/3/1/4/131406629/4098661.pdfIn PDF document text
    • https://taretowixulu.weebly.com/uploads/1/3/1/0/131070971/7617394.pdfIn PDF document text
    • http://ottics.ru/kevubuvemarug91c.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/jihkly7/gafokok.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/jjfQlgf/26148448946.pdfIn PDF document text
    • https://zudejafig.weebly.com/uploads/1/3/2/6/132681624/xiwonin.pdfIn PDF document text
    • https://dexazime.weebly.com/uploads/1/3/1/4/131437554/5830896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/falejogajir/gameboy_color_box_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/ecology_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/get_all_sheet_names_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/lomuvuviduvaduxi.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/approximating_square_roots_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/59753930505.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/drama_korea_brilliant_legacy_indonesian_subtitle.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B9 5272 bytes
SHA-256: 25a83f77e5a71084750cc4a86f2659ba48f41c14675ea748f8f6242fbf5d4ed6
font_01_sfnt_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 10660 bytes
SHA-256: 11f5ff204adb835ce9abc4ca4750ee55767c69c5dd8265846568b0b601db53d2
font_02_sfnt_off00010a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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