Malicious PDF — malware analysis report

Static analysis result for SHA-256 0808c65ff7a46ae5…

MALICIOUS

PDF

34.4 KB Created: 2020-05-15 07:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b4893500464e11ca9390776dbbec405 SHA-1: e3f6a3dc15e031f462947d405d233f2d9cf50cee SHA-256: 0808c65ff7a46ae54bad4c7de180c8564944cec4da8955ed440e645db65ca7e4
96 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its structure, which contains a large number of external links to other PDF files, a technique often used for SEO link farming or to distribute further malicious content. The document body, though partially corrupted, suggests a lure related to a 'material safety data sheet sample form'. No scripts were extracted, but the presence of numerous external links indicates a potential for distributing malicious payloads or engaging in phishing-like activities. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://thegapfestival.com/uploads/1/3/0/4/130483869/130483869.html#material+safety+data+sheet+sample+form
    • http://prosteeldetailing.com/uploads/1/3/1/8/131871739/2019110.pdf
    • http://cadhamltd.com/uploads/1/3/0/2/130289553/lavavuvefufunuza.pdf
    • http://bwuethrich.com/uploads/1/3/1/8/131871780/medanupisup.pdf
    • http://lanzarotepartyboat.com/uploads/1/3/0/2/130289561/214833.pdf
    • http://stpaulaugres.org/uploads/1/3/1/4/131454482/adfdff9bc7749.pdf
    • http://caringtampadentist.com/uploads/1/3/0/2/130287269/mixetu-rilil.pdf
    • http://hunterhartman.com/uploads/1/3/1/4/131406105/jonib.pdf
    • http://nursinghomemedicaidconsultant.com/uploads/1/3/0/4/130483520/tejifobizekixiz_dadalo.pdf
    • http://welcometogoldstar.com/uploads/1/3/1/3/131379409/kunesoderoser.pdf
    • http://losdospaelleros.com/uploads/1/3/0/5/130551364/4751741.pdf
    • http://4mahin.com/uploads/1/3/0/5/130588484/5201977.pdf
    • http://crappy2happy.com/uploads/1/3/1/4/131453182/37a8b2b9c3f22e5.pdf
    • http://virtualproductshots.com/uploads/1/3/0/3/130313826/8967501.pdf
    • http://pirlich.net/uploads/1/3/0/6/130620365/tesupowe.pdf
    • http://westfieldmats.com/uploads/1/3/0/8/130814250/tamegibasulog-jivirupimi-kawukiniru.pdf
    • http://handyfamilyhotels.org/uploads/1/3/1/1/131164278/9920647.pdf
    • http://lmeclectique.com/uploads/1/3/0/6/130603955/b7fa51293bf5e8f.pdf
    • http://koiwellnesscenter.com/uploads/1/3/0/3/130379522/93df4798fd65332.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aca.bin
3da7253382a74b0bc76ca68ecb0487dc6d1acd7f853fc03f0528b98023e0fc98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACA 10268 bytes

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