Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b3ac6b4c1655c1…

MALICIOUS

PDF

93.2 KB Created: 2020-11-16 18:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0d37a784838d5cd081f3bd33b3f1513d SHA-1: da7075c5c2d59d0ed6c4063c2a8c6fda6449f119 SHA-256: 96b3ac6b4c1655c1300a4e36cdf9cf2a441731cd461a6a6f5618860bd63034e3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://trafficel.ru/123?utm_term=the+tree+of+death+and+the+qliphoth+pdf PDF link annotation
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://biwewijusegi.weebly.com/uploads/1/3/4/5/134586848/3489533.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/kolerir.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/lexubugewofitis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_5fa3f2ffc8d74.pdfIn PDF document text
    • https://dowezepuxaku.weebly.com/uploads/1/3/4/4/134463959/wifesekuzabikaj.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/pezofut/86001223891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0f1678-1725-4077-969e-27f46fcaa6b8/mugikipanelemipefejod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8f0c26-1fb3-46de-985a-dd2999015ef8/word_with_friends_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/26808697796.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/preparation_of_ferrous_ammonium_sulphate.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/83215031089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55fa249-e7ff-4923-a63e-81c4a466f027/shane_sweet_arrested.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/nekevexulevefaragonuje.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB1 4816 bytes
SHA-256: 099bccaf0a0da5b07dc3f1bf95dbccf2594f8f1b6be09520c00890219b903a4d
font_01_sfnt_off00011efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFB 10864 bytes
SHA-256: 7ce710aa6c702467775d19bafad874bee5973ee502d35c9eb2dd8c34ecd65e89
font_02_sfnt_off000142fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FA 16376 bytes
SHA-256: ca692dbe31a8f7dff71bdd6f071688acae23566c081cf5c4f664dcad5a2cdbe8
font_03_sfnt_off000158dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158DD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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