Malicious PDF — malware analysis report

Static analysis result for SHA-256 408359423cfc0642…

MALICIOUS

PDF

78.7 KB Created: 2021-05-20 20:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8462a3fe7535521b2d12ae7cff38c8bd SHA-1: 653c6adb9df1e12c118ba31416be727a9bc2b2ea SHA-256: 408359423cfc064210229f3d0a0505e73782d78e81622cadb9660bb60fb1117b
186 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users. The presence of a URL related to 'how to make profit in gold trading' and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards malicious intent, likely to lead users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://nipisod.ru/strik?utm_term=how+to+make+profit+in+gold+trading PDF link annotation
    • https://notesorujul.weebly.com/uploads/1/3/1/4/131407176/lokijasokon.pdfIn PDF document text
    • https://bevifosadorafot.weebly.com/uploads/1/3/1/8/131856546/wuxovesulabewozil.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/7922253.pdfIn PDF document text
    • https://tavebesu.weebly.com/uploads/1/3/1/3/131381332/kukoriwejet_kelapero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_605bb9f049f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_605aeb5303828.pdfIn PDF document text
    • https://xotukowigadane.weebly.com/uploads/1/3/4/6/134683058/f17a4a0ff91ae21.pdfIn PDF document text
    • https://tipidaxu.weebly.com/uploads/1/3/0/7/130739537/gaparokadutada.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/3cc58f0e7a0bcce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_6014933c0ea40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5ffc8bfeb98ed.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/xuzugapavux.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/xubevena-kiseguzujozirer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_600d0bcf96844.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/6007827.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/51fe6ac4-8728-44b1-abc3-99b5fe55b81e/86683250053.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/global_trends_in_human_resource_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59eef0c2-6761-4515-aa04-dbba4813a680/koreb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff836e2-79e9-469d-b483-9b520f6474a9/how_to_trade_stocks_on_iq_options.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/lovely_video_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/716ca305-a46b-4456-97a9-634fc698f7b5/blackberry_2020_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b28a63-c177-4173-af40-092e38eb5586/85121078265.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_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 5088 bytes
SHA-256: 52063a6eef58fecfb602f955caf5b9d08e31ea29f0633699e34cb953d17586b5
font_01_sfnt_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 10712 bytes
SHA-256: 977cbe29b20b4b31c25a791be505c493d5ffcb6d4d3aa32ff8fdb802cf48a67e
font_02_sfnt_off00011d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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