Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff59d270e0cc74d…

MALICIOUS

PDF

45.0 KB Created: 2020-03-27 12:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c9ccadc2026ca0615a12609a1211eaf1 SHA-1: 9c70e0ebac9718b534c5d04d868b461991588e57 SHA-256: 1ff59d270e0cc74dfc7c5631907782dd9b889677bb95c3613ccf6d6ad0cb520e
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, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various domains, likely serving as landing pages or further redirection points. 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://shopevergreenorganics.com/uploads/1/3/0/8/130873771/130873771.html#mural+dia+de+la+independencia
    • http://www.fancyfishupcycling.com/uploads/1/3/0/6/130639244/papoledub.pdf
    • http://mountforesthomecoming.ca/uploads/1/3/0/5/130539652/9617927.pdf
    • http://browsenodeinfo.com/uploads/1/3/1/0/131069750/0185488.pdf
    • http://www.relifed.org/uploads/1/3/0/2/130291766/tugegekul.pdf
    • http://www.rwstoneware.com/uploads/1/3/0/7/130740210/fogunakiziposok-dawuzukuwo-kuvogotawukunez-resawifuxubug.pdf
    • http://tuffmoney.net/uploads/1/3/0/7/130738893/gudevedi_rofuzul_kiwiwerev.pdf
    • http://jaredroach.com/uploads/1/3/0/2/130289736/kugawosekipunaji.pdf
    • http://sokaproject.com/uploads/1/3/0/4/130476208/30724513e4770a.pdf
    • http://www.frommylittlecorner.net/uploads/1/3/0/2/130270982/tojopezeb.pdf
    • http://5fiftymusic.com/uploads/1/3/0/5/130588459/2531138.pdf
    • http://amarasdesigns.com/uploads/1/3/0/8/130874489/xufegemuw.pdf
    • http://www.vogelsigns.com/uploads/1/3/0/2/130270936/jafujojabavuwasi.pdf
    • http://classicmassagestudio.com/uploads/1/3/0/4/130483728/suxiderupaxuveromud.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_off0000851e.bin
9cee5bac21b4eb2dec6d875bd37a44e04cfd1f93f64e812d1e68f84c828c676d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851E 8968 bytes

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