Malicious PDF — malware analysis report

Static analysis result for SHA-256 21cea61b2c7d51e0…

MALICIOUS

PDF

56.1 KB Created: 2020-07-08 14:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: d8f37ea20872e6daf59118a83475c0b8 SHA-1: 2fd3d2bfe4fa8b73417944b21fd5c4eadf566117 SHA-256: 21cea61b2c7d51e0c9715f5e049e269b5e7132ed343cc3458157ef19615facce
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though malformed, contains text related to a Tissot watch and includes the primary malicious URL. This suggests the document is designed to redirect users to potentially harmful sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/wb?keyword=tissot%20automatic%20chronograph%20manual In PDF document text
    • http://files.dynacomltd.com/uploads/1/3/2/7/132710782/5a1451c1.pdfIn PDF document text
    • http://files.medfieldheightspto.com/uploads/1/3/1/0/131070190/joridesaz.pdfIn PDF document text
    • http://files.jimcohenjudaica.com/uploads/1/3/1/4/131453946/348044d828fd.pdfIn PDF document text
    • http://files.stfranciscentre.net/uploads/1/3/0/7/130739690/kuterubabajusosakux.pdfIn PDF document text
    • http://files.pjeterkoleci.com/uploads/1/3/2/6/132681938/f414f68e3faf.pdfIn PDF document text
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdfIn PDF document text
    • http://files.healingsoundsofmusic.com/uploads/1/3/0/9/130969986/rupelaladetenosinog.pdfIn PDF document text
    • http://files.bohemiansagegallery.com/uploads/1/3/0/7/130739002/3fc907b3f.pdfIn PDF document text
    • http://files.mayusilkart.org/uploads/1/3/1/3/131383664/2245704.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://famunuguraj492377956.files.wordpress.com/2020/07/mojerolajuxis.pdfIn PDF document text
    • https://wubatelevad.files.wordpress.com/2020/07/dokuvimukufowovif.pdfIn PDF document text
    • https://natogobus.files.wordpress.com/2020/07/91361528928.pdfIn PDF document text
    • https://zigonasoxovu.files.wordpress.com/2020/07/tepam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E44 5060 bytes
SHA-256: 4c72e1e2ad2f4d95b74bdd97d372ee401581fe87f81fef476586df158d106cf4
font_01_sfnt_off0000af47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF47 10704 bytes
SHA-256: 0a9f4af3e0f1191bb614b6bc54fae6507787dfca1118d48b5222d56e95294677

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