Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4edc3c8d1ab5d5…

MALICIOUS

PDF

76.2 KB Created: 2021-02-17 09:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b5cb6144e3c33bc321457a9c89ac1839 SHA-1: 8f9d0fc423208488cfe180d6255c02f7d0ce7344 SHA-256: 9a4edc3c8d1ab5d5168fab404d3044b337a6e4e3eb5d1362d0de0952701b6079
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely related to distributing further malware or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=how+to+calculate+common+dividends+per+share PDF link annotation
    • https://cdn.sqhk.co/jigavozef/VhitiaV/black_friday_sales_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/gjWc7mt/whatsapp_messenger_download_for_pc_softonic.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/6iamHBU/80633245749.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/ggehfja/35706186962.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/wiaGkjf/mushroom_kingdom_warriors.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/fTLqghc/45742871651.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/jbLgghb/bipavajanidorituza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_5fdc010f2fb53.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/ifjdQja/10339683868.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/41f7af68042.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/4hhcYgi/29987955575.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/AatcCig/callaloo_seeds_for_sale.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/sudevejerifu/canal_street_full_movie.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_off0000dd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD95 5308 bytes
SHA-256: 7a9307eda6d9050ad39a69b725b060ddc1aa03bfc043bc20882d8433f703dda1
font_01_sfnt_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 11172 bytes
SHA-256: 03cca511436ef20893be1f2e7986b3189f4c0a19e1f88cd93fa7b8a822bce49c
font_02_sfnt_off000115c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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