Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa60ce72acad126…

MALICIOUS

PDF

75.3 KB Created: 2020-12-23 22:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e4048fdd02a943c760daab0057120dfc SHA-1: 2761934fbb8a44e9afb439ee486ee7f6d6375aa6 SHA-256: 4aa60ce72acad1264e5ff1eb7275d3bc3b987b63dbab041c9efb9edb5d6efd0a
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=figurative+language+in+song+lyrics+worksheet+answer+key PDF link annotation
    • https://xipuparazapare.weebly.com/uploads/1/3/4/8/134862845/4dc1a14341a6c8.pdfIn PDF document text
    • https://baraxuworasexe.weebly.com/uploads/1/3/4/6/134633060/1393128.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/RJcCBks/pixel_zombie_frontier_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/RHEhdT4/olympics_2020_logo_2021.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/subota.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/q6gdjbz/29828556436.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/d3e4ca9503a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34fa166-3cc1-44cd-840f-bc51ef2b49ea/kibotogigeneje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b33238-0d2d-4ec1-b4a2-8eae0f5742bc/kenorixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5356e13f-ee32-4356-b658-562736d626bc/dakanunoxafetajubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013e1c23-a8d4-429f-bcde-754dae438ece/book_of_hours_rainer_maria_rilke.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_off0000e81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 5332 bytes
SHA-256: cec0f1f6216a70f8db4e927e1af41649ce9bbb19269da031b4072605842f598f
font_01_sfnt_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 10952 bytes
SHA-256: 759d2c864c1eec65a8decc1aea2d82f437999e14410d9e0a12cfb58d315598a7