Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a8b04c01c1870f…

MALICIOUS

PDF

69.9 KB Created: 2021-02-14 08:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c810e60501ed84a410bcc8d3f08892db SHA-1: 74a7eb643e002a82bfa0e3dea39febc8b87efa3e SHA-256: a0a8b04c01c1870ff02787e69a6d7d1f037ddc425b2300bc02af8bf11941615f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, characteristic of a link farm designed to drive traffic to potentially malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to redirect users to external content, likely for phishing or malware distribution.

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/aws?utm_term=call+of+duty+movie+free PDF link annotation
    • http://gigurokubi.66ghz.com/brainstorming_template_elementary.pdfIn PDF document text
    • https://pejegenipejixe.weebly.com/uploads/1/3/4/8/134848799/0c9d28610b53eb.pdfIn PDF document text
    • https://cdn.sqhk.co/dudexobexine/gpYKjcS/new_bollywood_mp3_songs_collection_zip_file_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kevamubeminu/gAjdgcY/animated_sticker_maker_for_whatsapp_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450242/normal_5fe082af7d160.pdfIn PDF document text
    • http://wopivobozas.66ghz.com/54089054718.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/vuxekovuvubamejed.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/jggeXhf/zutuguzokaletixide.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/8541790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446036/normal_6007d1e3315cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fikamax.epizy.com/50629294320.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/bhagavad_gita_in_telugu_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/apt_asx_reporting_date.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/hr_executive_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/18044085217.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/artusi_oven_user_manual.pdfIn PDF document text
    • http://nebokidib.epizy.com/sibelajulaxijagadisad.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/catalina_mojave_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/bounce_ball_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/principles_guidelines_synonym.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_off0000d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AC 4940 bytes
SHA-256: 60fe1fa0ae0f6bedc0ac2c7c1a2cfda1417e834e3c4e4e67dfefa3dced5b3d14
font_01_sfnt_off0000e771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 10300 bytes
SHA-256: 2f8788cd59e759001811b05c959f4cf0686953863f5d8ab83aeff43b0c4b11e7

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