Malicious PDF — malware analysis report

Static analysis result for SHA-256 5599ecaa7c059449…

MALICIOUS

PDF

50.3 KB Created: 2020-03-22 12:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: cfa187f17775b5a17a828397fec5b039 SHA-1: 270c9daa13bd0370e831337d0786b3eb202ab232 SHA-256: 5599ecaa7c0594494e8b4ef399771b78e64d338b1c3e6bf84d0ea043e9fc1949
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for further malicious activity, such as downloading second-stage payloads or phishing attempts.

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://bloodblisterapparel.com/uploads/1/3/0/5/130589057/130589057.html#spontaneous+reaction+delta+g PDF link annotation
    • http://carterskennel.com/uploads/1/3/0/7/130739141/pebinawesonofup_jizubotijageze.pdfIn PDF document text
    • http://broncweb.com/uploads/1/3/0/6/130604549/dbc77fe22f9.pdfIn PDF document text
    • http://shannanstanciuforschoolboard.com/uploads/1/3/0/6/130620557/f1cd30c.pdfIn PDF document text
    • http://zendreaming.com/uploads/1/3/0/5/130588721/822b127e25cd.pdfIn PDF document text
    • http://travelwithpapino.com/uploads/1/3/0/4/130476505/e8233515c.pdfIn PDF document text
    • http://myrole.consulting/uploads/1/3/0/4/130476697/f6e03a7cda6225d.pdfIn PDF document text
    • http://www.artisticcreationsbycarma.com/uploads/1/3/0/5/130539440/2f29f2bedb48b5b.pdfIn PDF document text
    • http://stephenknighttattoo.com/uploads/1/3/0/2/130288394/tilaxuliledipaxefora.pdfIn PDF document text
    • http://remzmusic.org/uploads/1/3/0/2/130274338/c07129.pdfIn PDF document text
    • http://sailsea.org/uploads/1/3/0/6/130621344/xolilowagazeg.pdfIn PDF document text
    • http://nocritter.com/uploads/1/3/0/9/130969817/1d7b40b46b6158.pdfIn PDF document text
    • http://www.ancient-hearts.com/uploads/1/3/0/7/130738890/tijik.pdfIn PDF document text
    • http://hermitagefarmgrandgala.com/uploads/1/3/0/6/130604872/2625164.pdfIn PDF document text
    • http://perumarket.net/uploads/1/3/0/5/130551155/adc8cdc.pdfIn PDF document text
    • http://www.jerzeyfreshsalons.com/uploads/1/3/0/8/130874192/4835432.pdfIn PDF document text
    • http://libertadmarketing.net/uploads/1/3/0/7/130776874/ragotosuzelu_juxuwolotomux_zosasuv_gexib.pdfIn PDF document text
    • http://johncrossmobilehairdressing.co.uk/uploads/1/3/0/7/130739144/6cd1c.pdfIn PDF document text
    • http://aconvergentinvestment.com/uploads/1/3/0/6/130605076/gasal.pdfIn PDF document text
    • http://sequoia77.pleasingfood.com/uploads/1/3/0/6/130620454/kamomefizevevax.pdfIn PDF document text
    • http://dfwprints.com/uploads/1/3/0/5/130588874/lofugonojopibezase.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

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_off00008568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8568 8652 bytes
SHA-256: 20aa8ef94651ac59843ece3256accf60886996096dcf45d6e76f60e365e468df
font_01_sfnt_off0000a6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D1 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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