Malicious PDF — malware analysis report

Static analysis result for SHA-256 165b54e858445f26…

MALICIOUS

PDF

72.4 KB Created: 2021-02-13 05:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0ca7b45e3a70a25660cd96d022b80021 SHA-1: 2a662d57892b7a1f2982b02ce63902772cd60b63 SHA-256: 165b54e858445f264d48318ef9fd63259d1670c9d838a85e38833937e0781d74
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, directing users to various websites. The document body, though partially corrupted, suggests a lure related to 'Louisiana state wrestling tournament 2020 results'. The presence of multiple disposable hosting domains and the ML classifier's high confidence score indicate a malicious intent, likely for SEO spam or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=louisiana+state+wrestling+tournament+2020+results PDF link annotation
    • https://dezamemev.weebly.com/uploads/1/3/4/7/134746632/wibuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_600bf75bde052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5fe8e5603928e.pdfIn PDF document text
    • https://morisefomu.weebly.com/uploads/1/3/0/9/130969566/mipipage.pdfIn PDF document text
    • http://hotloveme.online/90310557877tixxt.pdfIn PDF document text
    • https://menuzuxa.weebly.com/uploads/1/3/1/0/131070619/wiboxolo.pdfIn PDF document text
    • http://mishabelle.ru/26827147537l7qlt.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/suxunijewa-boxamiwuz-denet.pdfIn PDF document text
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/wubezobija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427077/normal_5ff9b5128df96.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/hjTjgV0/97905189878.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/3e2c508b.pdfIn PDF document text
    • https://neredijavapud.weebly.com/uploads/1/3/1/4/131409024/a92ad63155a3c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383327/normal_5ff60f2abe4b3.pdfIn PDF document text
    • https://rosowimibezot.weebly.com/uploads/1/3/5/3/135392622/nuxovot.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/dblhhbq/soccer_ball_psi_size_5_fifa.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/5045253.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/jczemoJ/finger_play_soccer_dream_league_2020_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_60162e4d19fef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE43 5312 bytes
SHA-256: daebf29ba681188ed2d42af0e3f7a1f04144d00f62a5a201c0fd6c9c20f87abb
font_01_sfnt_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 10336 bytes
SHA-256: a64a23c07a7848e248c2840f156ce247ccd3d404d36b71899f6ad8d386bca4dd

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