Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f1c7696ead2181…

MALICIOUS

PDF

50.7 KB Created: 2020-04-02 01:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 49009d46d756578bd53ed4375c299123 SHA-1: cd4b4168e9d2d311478f2d27e3f7cffcde52d0e8 SHA-256: 50f1c7696ead2181812f6a77d5bc9a03d7bb46e8c46ae03dba3931db74ee83b8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO abuse, likely intended to generate traffic or ad revenue. The document body itself is heavily obfuscated but contains references to the URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://triplethreeart.com/uploads/1/3/0/2/130273610/130273610.html#significado+de+tamizado+diccionario PDF link annotation
    • http://thebestblackhairstyles.com/uploads/1/3/1/0/131071288/15b9dff.pdfIn PDF document text
    • http://www.oroxflexo.com/uploads/1/3/1/4/131437826/f3d527.pdfIn PDF document text
    • http://merrymanchiropractic.com/uploads/1/3/0/5/130588977/760015.pdfIn PDF document text
    • http://gammagroupmiami.com/uploads/1/3/0/5/130539269/6558114.pdfIn PDF document text
    • http://fluentlanguageconsulting.com/uploads/1/3/0/3/130379228/7386295.pdfIn PDF document text
    • http://jmdconseil.com/uploads/1/3/0/6/130620834/6060056.pdfIn PDF document text
    • http://papillonsolutions.com/uploads/1/3/0/6/130620614/1d67fb3fc77b59f.pdfIn PDF document text
    • http://aljuzoralarabiya.com/uploads/1/3/0/2/130289466/vuboso.pdfIn PDF document text
    • http://instagram1000.com/uploads/1/3/0/7/130739291/divexovojanuloba.pdfIn PDF document text
    • http://radiology-relief.com/uploads/1/3/0/4/130435688/2a7d144b89b.pdfIn PDF document text
    • http://ilianagenna.com/uploads/1/3/0/6/130604459/pirejemugifinadefak.pdfIn PDF document text
    • http://drangelaadelman.com/uploads/1/3/0/6/130620942/rotoxosozamamil.pdfIn PDF document text
    • http://andersonandhartlaw.com/uploads/1/3/0/7/130739027/juxanodowamixe_jasodugawos.pdfIn PDF document text
    • http://nauramusic.com/uploads/1/3/0/3/130323630/pujejobixirase.pdfIn PDF document text
    • http://seven16live.com/uploads/1/3/1/4/131437425/bubikefot.pdfIn PDF document text
    • http://newzealandfeijaos.com/uploads/1/3/0/5/130589199/duzisamuveramonur.pdfIn PDF document text
    • http://ewalondon.com/uploads/1/3/0/7/130775823/709704.pdfIn PDF document text
    • http://whiteeagleglobalsolutions.com/uploads/1/3/0/5/130551366/9d0027f.pdfIn PDF document text
    • http://mistyislandbernese.com/uploads/1/3/0/7/130775182/1b613843725b35.pdfIn PDF document text
    • http://michiesdogmeatsandtreats.com/uploads/1/3/0/4/130483043/464193fd5f4.pdfIn PDF document text
    • http://vintagemxonline.com/uploads/1/3/0/7/130739809/8828509.pdfIn PDF document text
    • http://gentlehandsnc.com/uploads/1/3/0/4/130483200/8127ea4cea5.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C98 8668 bytes
SHA-256: 3463981c15027aef98b0c7625fdc58392a8d426c4b692468ae16408336ec967c
font_01_sfnt_off00009bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDB 2768 bytes
SHA-256: 11eff0542ee112a7a4f3d5fa86892f13f7f7c80edb17354215cea33bb7714487
font_02_sfnt_off0000a5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A5 16096 bytes
SHA-256: ff8fb627f3d0dd9997bbf5f8e67d75ba984810f76280c6dead7bf9ae512bf231

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