Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe42c165b306a3c…

MALICIOUS

PDF

83.2 KB Created: 2021-03-20 20:10:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6dd7b03da26b93c4bd508f605a4b657c SHA-1: 2da0f97bd311d75acb741a9588167f56e751080f SHA-256: ffe42c165b306a3cf37bb9c18d8eb79c727c6332437332e72a741867b353e1a8
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document exhibits multiple indicators of malicious intent, including a high ML classification score and ClamAV detection as a phishing trojan. The presence of a 'download button' lure and a 'payment redirection' lure suggests a phishing or scam attempt. The document also contains numerous external links, with one pointing to a potentially malicious URL, indicating it may be part of a link farm designed to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/wix?keyword=fly+gps+for+lollipop+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375507/normal_601f5cc811eed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_602445c4e5668.pdfIn PDF document text
    • http://posuvukapimufes.iblogger.org/limiting_adjectives_worksheets_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446496/normal_600e017e6d5a4.pdfIn PDF document text
    • http://lazotub.mywebcommunity.org/sailing_knots_for_fenders.pdfIn PDF document text
    • http://rorafosuwis.22web.org/banerji_protocol_book_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471479/normal_602ed099de743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5feffa280ffc3.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/litunux/browser_speed_comparison.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/tl-wr841n_firmware_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/tatusefafelulotu.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/apus_launcher_mod_apk_no_ads.pdfIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_8f24f967709740fb93473b45c2c2c8e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/82840156757.pdfIn PDF document text
    • http://vujijemu.atwebpages.com/15556815004.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/93549911133.pdfIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_94135da9097e4227b24f3af14b990cae.pdf?index=trueIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_734791d78f4b408c998aa2c405261f4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/journal_el_watan.pdfIn PDF document text
    • http://tomikuwabawevup.epizy.com/que_come_un_oso_polar_en_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/tulofemolapevumasaxev.pdfIn PDF document text
    • http://pavafisufopu.myartsonline.com/big_data_analytics_tools_and_technology_for_effective_planning.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 5420 bytes
SHA-256: cd4ddad6cac7b05ee069ca658a4bf3c07a036aea9e919e63884342ed611a04ef
font_01_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000100ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AB 11108 bytes
SHA-256: e3e49b8b6010d8cd322aa622ce81fc9f2b7bb2239b2283f8888e33d5bdeb7d32
font_03_sfnt_off000126a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A4 16372 bytes
SHA-256: b8c7d849e266983a36785310187976a2ad8968d41fd29301e15cd74781c2ee86

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