Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f01733afc17373…

MALICIOUS

PDF

41.1 KB Created: 2020-04-17 02:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d1b0aa5aa909814fa1f8a8c046a15549 SHA-1: fd1f100d561b308656e58f6356c8c74e8315275c SHA-256: c7f01733afc17373cc27e058f92241df17186cd01f9078ee0e4e20197e14cf4f
94 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing a large number of external URLs pointing to other PDF files. This technique is often used for SEO manipulation or to host phishing content. The ML classifier strongly supports the malicious nature of this PDF.

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://chrisbosgraaf.com/uploads/1/3/1/6/131607054/131607054.html#fishbone+labs+template
    • http://jadejalopypress.com/uploads/1/3/0/7/130775186/60d4cc2770.pdf
    • http://www.treeservicemoncton.com/uploads/1/3/1/3/131383227/pavenogukizagim-vakaxiwugen-zupunilegakama-wedobad.pdf
    • http://zdlavv.com/uploads/1/3/1/4/131438788/tuvuzetaw.pdf
    • http://reconcileaustraliaparty.org/uploads/1/3/0/7/130775615/332fa.pdf
    • http://xtrainershocks.com/uploads/1/3/1/6/131637631/80fc341cabc9.pdf
    • http://schickbrasil.com/uploads/1/3/0/9/130969496/larav.pdf
    • http://eversavor.com/uploads/1/3/0/2/130287313/c3f70aab212e.pdf
    • http://stjameslcms.org/uploads/1/3/0/2/130291884/e64a56dec7d1147.pdf
    • http://wesous.com/uploads/1/3/1/3/131381658/dubaroja_gojaboridexogof.pdf
    • http://elisadesign10.com/uploads/1/3/0/3/130324278/dixekuluzisal.pdf
    • http://eversavor.com/uploads/1/3/0/2/130287313/c3f70aab212
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007692.bin
44d14c7903dd62440dd02f11e234db0222c4a2e2c827d006e5f21f1af8d2721f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7692 8588 bytes

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