Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc9e00de874015d…

MALICIOUS

PDF

35.9 KB Created: 2020-06-14 12:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 875173eabcc69a21a2b5c37db07b45fe SHA-1: 6b5b0c0a96ef7914e5a32d7a8bd849746cf91b4f SHA-256: cdc9e00de874015d4e8576fcf1bf39d14cbf9254b74154dfea641aa335ffcbc0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body, though heavily obfuscated, also contains some of these 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://hootnanniegame.com/uploads/1/3/0/7/130775820/130775820.html#river+island+mens+shirt+size+guide PDF link annotation
    • http://mta-sts.mail.harringtonstreetgallery.com/uploads/1/3/1/1/131164573/6220332.pdfIn PDF document text
    • http://atribecalledhern.com/uploads/1/3/0/7/130775567/lomuwibales.pdfIn PDF document text
    • http://susiemann.com/uploads/1/3/1/4/131452947/5882519.pdfIn PDF document text
    • http://drakonblustudios.com/uploads/1/3/1/4/131454394/e94f5c3b8cb4a.pdfIn PDF document text
    • http://4w.undesirable.us/uploads/1/3/1/4/131438234/valutipasedadiw.pdfIn PDF document text
    • http://proteus-mrighifu.net/uploads/1/3/1/3/131380604/suruj_befewafotol_meselonebojaf.pdfIn PDF document text
    • http://barbedwirestudio.net/uploads/1/3/0/8/130813635/fazonupegifivat_fakazogo.pdfIn PDF document text
    • http://centagonhr.com/uploads/1/3/0/5/130589360/xujaguwiwepaxus_nagate.pdfIn PDF document text
    • http://webdisk.happyfamilyhealthyhome.com/uploads/1/3/0/7/130775393/454867.pdfIn PDF document text
    • http://hostmaster.cystitiscure.co.uk/uploads/1/3/0/7/130774999/3d30d51.pdfIn PDF document text
    • http://riazzis.com/uploads/1/3/0/7/130740242/wugivezubisodalekoju.pdfIn PDF document text
    • http://zond.com.au/uploads/1/3/1/3/131381782/fobuxu-lolurisojibid-xeturedado.pdfIn PDF document text
    • http://philsheridanstudio.com/uploads/1/3/1/3/131381612/jorifidokoxasoren.pdfIn PDF document text
    • http://rachelsbakehouse.com/uploads/1/3/0/4/130483273/fikorisini_lizunuwef_xebiwinuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rolabetupi.files.wordpress.com/2020/06/litabuj.pdfIn PDF document text
    • https://wurumopo.files.wordpress.com/2020/06/sajeli.pdfIn PDF document text
    • https://xekakir790276190.files.wordpress.com/2020/06/10910969794.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 6

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5D 10748 bytes
SHA-256: 78650a26588b2997026954ed6182d19aaf5532bb6a435e4bca474dc16a878c28

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