Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ee2a147de76f6e…

MALICIOUS

PDF

74.8 KB Created: 2021-03-14 16:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a39443db52fa85f3f6bba1bcf504b38c SHA-1: cab668bea2352b9e6a4e778201dc152d61022c06 SHA-256: 19ee2a147de76f6ee005e636499e93d937d9501bd2cb8670f34083d93f4861e8
246 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Apple, referencing an "apple id verification code" and directing users to a URL that appears to be a redirector for a phishing attempt. The presence of numerous external links, many on disposable hosting, suggests a link farm designed to distribute phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely credential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/sazuxa_kazolexoz.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=your+apple+id+verification+code+is+sms PDF link annotation
    • http://nubolutlion.xyz/fantasy_name_generator_female_demon00105.pdfIn PDF document text
    • http://ru-dev.xyz/is_eating_wild_game_healthy_for_youbfi0a.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/sazuxa_kazolexoz.pdfIn PDF document text
    • http://linza.media/66337531243fvkhs.pdfIn PDF document text
    • https://mosaminaworite.weebly.com/uploads/1/3/1/6/131636744/jivegategekevij.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://uploads.strikinglycdn.com/files/e10cfb77-f7cd-4636-9fd6-e4a1170eb91b/36600978359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc6b92a-6224-4ba1-b860-0f60aca6a8bf/creating_website_using_html_css_tutorial.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_faa736eed77b4d598cf46baf152fe3db.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_ff8b835a18a548bbb31f09f16f162ea8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetevali/61038921232.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_454017d90d8b45caa643907f03417347.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/android_developer_api_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 5204 bytes
SHA-256: 1d99272d29b72e683fac94ff424da51f91e70f5baa06f79108702747b774ad95
font_01_sfnt_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 10324 bytes
SHA-256: 0698e5fd3048ea0163a549429f34747e25892bfb93bd588dca963d6a1589c908
font_02_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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