Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8f8e2ec1d2d88e…

MALICIOUS

PDF

38.1 KB Created: 2020-03-10 02:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 341f0ae2087f2ad8c46505414a99f3a9 SHA-1: 24dff3f2d89f8e191e74936f4908132f7b55027a SHA-256: fa8f8e2ec1d2d88e4006d61dba025458d9af309373480d0c223103be3ba6ce70
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or a phishing campaign designed to redirect users to potentially malicious content. The ML classifier strongly supports the malicious verdict.

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://0ws5k.bpmtc.com/uploads/1/3/1/1/131164572/131164572.html#conscientiousness+scale+test
    • http://originalraiders.us/uploads/1/3/0/7/130775627/8132915.pdf
    • http://mx.cincytshirt.com/uploads/1/3/0/3/130313491/5d14b738e.pdf
    • http://colormeinkdesign.com/uploads/1/3/0/5/130551467/2381472.pdf
    • http://www.fusion-4u.com/uploads/1/3/0/5/130590169/8987266.pdf
    • http://brianpastor.com/uploads/1/3/0/2/130288458/fovalefe-bulikodiw.pdf
    • http://www.tengoundolorfisicoenmicabeza.com/uploads/1/3/0/5/130590296/3169423.pdf
    • http://piropeandopueblo.com/uploads/1/3/0/6/130604934/vikarutilofal-fofexesole-mifipoweteziz-kidop.pdf
    • http://integrityapartmentsllc.com/uploads/1/3/0/6/130604500/rifigivadiribega.pdf
    • http://aliedwards.org/uploads/1/3/0/8/130814004/f80de95586.pdf
    • http://unbarredlawyer.com/uploads/1/3/0/7/130739119/furito.pdf
    • http://clearlaketherapy.com/uploads/1/3/0/9/130969887/notalutataze_lekajeb.pdf
    • http://abillingc.com/uploads/1/3/0/7/130776222/4d4698a7e06.pdf
    • http://www.stanfordhumanriskresilience.com/uploads/1/3/0/5/130539279/sosidupegexotoxe.pdf
    • http://www.chelseagould.com/uploads/1/3/0/3/130379522/muwikikiri.pdf
    • 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_off00006cc3.bin
fda9dcf950bb0849bf823c8277039f9d5454cded9c5f352f57ccd82c5b2bc134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC3 7932 bytes

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