Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7794c1ecea1a329…

MALICIOUS

PDF

66.5 KB Created: 2020-12-04 15:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ebc4a089f3eb061892d678a18c933d59 SHA-1: 91733f6cfb5ae1ecfa80120827fd8c835838539c SHA-256: d7794c1ecea1a3296ce5440b6795da28aefc442e5026ded643a9d2109b138c82
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/123?utm_term=the+laugh+of+the+medusa+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f91cca98e0b3.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/36edf830e6a.pdfIn PDF document text
    • https://jaxobowes.weebly.com/uploads/1/3/4/5/134591409/labamazopaze_rusunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5fc13e41b7b4b.pdfIn PDF document text
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/3123789.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/3086049.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/jinabisura/pretentious_game_4_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b9bc73-b1e5-4277-aa5b-bb2608ed4393/71833794371.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/50066407881.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/best_meme_creator_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/annual_report_of_coca_cola_company_2015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe07e4fa04221c71e7bbd7/1606289381181/jitezew.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_off0000c812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC812 5276 bytes
SHA-256: 54a9f71bc46026b4f3b29615f4b8dc6a4f7a981926c0456ed3792ac662689dd8
font_01_sfnt_off0000d9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 10504 bytes
SHA-256: eded5abaeaed96f2906d6cc3c5c1ae5a8c017da91f7db40977e6863c0904c4d9