Malicious PDF — malware analysis report

Static analysis result for SHA-256 530f3b93fe1416c3…

MALICIOUS

PDF

96.7 KB Created: 2021-05-19 02:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b8195f2db5574008b6207fa956195b2d SHA-1: 26ae5b50240de0497a55a8f92a67b45d82558b09 SHA-256: 530f3b93fe1416c3cdad2c08508fa0e04e1251d102fab44513624a2c373cbec4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to other PDF files, suggesting a link farm or SEO spamming attempt. One of the primary external links points to a URL that appears to be a lure for movie downloads. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links, combined with ClamAV and ML detections, indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/strik?utm_term=jeepers+creepers+2001+tamil+dubbed+movie+download PDF link annotation
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/komidoxadexoderovu.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/borukagusaxit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5fe75e99e6228.pdfIn PDF document text
    • https://gokasesebigi.weebly.com/uploads/1/3/3/9/133986942/vepagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_606a10b405fdf.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/2968948.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369331/normal_5fdf1199f26ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477892/normal_601f72889c792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_600590b22f74e.pdfIn PDF document text
    • https://rugexosijebup.weebly.com/uploads/1/3/4/0/134017508/5515057.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/jesidofefe/g_suite_email_signature_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/mubezejapozogapufa.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/common_greek_and_latin_roots_for_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/why_did_the_stock_market_crash_caused_the_great_depression.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/78588289499.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/technical_data_sheet_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/21530119896.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/nudunimun.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/autodesk_revit_2018_architecture_fundamentals.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/how_to_practice_socratic_questioning.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 2988 bytes
SHA-256: 49d08c9dabb58d6e888314469d8a0d64a988e73f3a7160e8662ab200b1e53c85
font_01_sfnt_off000112c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C9 5708 bytes
SHA-256: 610286ef914b74fe7df3bfa41b773404ed4817d1d1e9d25426d9ec096a0b8ff0
font_02_sfnt_off00012624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12624 12540 bytes
SHA-256: 22eefcfbf25485c6baa01dbc40ef6d8495ff4cf612c0bd74a598813b0b766c55
font_03_sfnt_off00015028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15028 16344 bytes
SHA-256: d0fb5fce634c5ae045d9d51b53efdaafa0e493a21a7fb7894ae1efe0f71839ed
font_04_sfnt_off0001660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1660C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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